J.W. PUBLICATIONS

[1] V.M. Bystritsky, V.V. Gerasimov, A.R. Krylov, S.S. Parzhitski, G.N. Dudkin, V.L. Kaminskii, B.A. Nechaev, V.N. Padalko, A.V. Petrov, G.A.Mesyats, M. Filipowicz, J. Wozniak, and Vit.M. Bystritskii. Study of the pd reaction in the astrophysical energy region using the Hall accelerator. Nucl. Instr. and Meth. A, 595:543-548, 2008.
The pd reaction at ultra-low proton-deuteron collision energies has been studied using the Hall pulsed ion accelerator and the solid target of heavy water D2O. The experiment on measurement of the astrophysical Spd factor and the pd reaction cross-section was carried out at average pd collision energies 8.28, 9.49, and 10.10 keV. The 5.5 MeV gamma rays from the pd reaction were detected by detectors based on plastic scintillators and NaI(Tl) crystals. Parameters of the accelerated hydrogen ion flux were measured and monitored with diagnostic equipment consisting of an energy analyzer, plasma optical radiation detectors, the Rogovsky belt, and collimated Faraday cups. The results obtained agree within the errors with the data of the pd experiments carried out by the LUNA collaboration at the Gran Sasso Laboratory with a target filled with gaseous deuterium. The reported experiment was carried out at the Hall ion accelerator of the Research Institute of Nuclear Physics, Tomsk Polytechnic University.

[2] V.M. Bystritsky, V.V. Gerasimov, A.R. Krylov, S.S. Parzhitski, P.S.Ananin, G.N. Dudkin, V.L. Kaminskii, B.A. Nechaev, V.N. Padalko, A.V. Petrov, G.A.Mesyats, M. Filipowicz, J. Wozniak, and Vit.M. Bystritskii. Study of the d(d,n)3He reaction in the astrophysical energy region with the use of the Hall accelerator. Eur. Phys. J. A, 36:151-158, 2008.
The results of the measurements of the astrophysical S-factor and cross-sections of the reaction dd->3He + n in the deuteron energy collision range of 2.3-6.2 keV are presented. The experiment was carried out at the high-current deuteron beam of the Hall pulsed accelerator (FSSI Nuclear Physics Institute, Tomsk). Deuterated polyethylene (CD2) targets and frozen heavy water (D2O) were used. Neutrons were detected by eight plastic scintillation counters (375x100x100 mm3) located around the target. The results obtained in the present work substantially differ from the results of the experiments conducted with the use of deuterium saturated metal targets (TiD, TaD, ZrD, PtD). Within statistical errors of measurements there is no discrepancy between the present results and the results of the experiments performed with the heavy-water targets and filled with gaseous-deuterium targets.

[3] M. Filipowicz, V.M. Bystritsky, V.V. Gerasimov, and J. Wozniak. Kinetics of muon catalyzed fusion processes in solid H/D mixture. Eur. Phys. J. D, 47:157-170, 2008.
This paper presents the final results of an experimental study of the kinetics of the muon catalysed fusion (MCF) in solid hydrogen-deuterium mixtures (H/D) at a temperature of 3 K. The experiment E742 was carried out on a TRIUMF meson facility in Canada. Four exposures were performed at different deuterium concentrations in the H/D mixture: cd = 0.0005, 0.02, 0.15 and 0.75. A simultaneous analysis of the measured time distributions of the 5.5 MeV γ-quanta and the 5.3 MeV conversion muons obtained from nuclear fusion in the pdμ molecule allowed to extract the values of MCF chain parameters in the H/D mixture: the fusion partial rates for different nuclear spin states of the pdμ molecule, and the pdμ molecule formation rate. The experimental data fitting procedure was conducted in two ways: using solely the analytical formulae describing the kinetics of the MCF processes in the H/D mixture, and the detailed Monte Carlo simulation of the entire experiment. The results obtained by these two methods are consistent with each other and confirm the existence of the Wolfenstein-Gerstein effect.

[4] B.A. Nechaev, G.N. Dudkin, V.L. Kaminsky V.N., V.N. Padalko, A.V. Petrov, V.M. Bystritsky, V.V. Gerasimov, S.S. Parzycki, Vit.M. Bystritskii, and J. Wozniak. Determination of true quantity of accelerated particles (ions, neutrals) falling on a metal target. In B. Kovalchuk and G.Remnev, editors, 15-th SHCE Proceedings, pages 148-150, Tomsk, Russia, 2008. Publishing House of the IAO SB RAS. [15-th International Symposium on High Current Electronics, Tomsk, 21-26 Sept. 2008].
The procedure of measuring of the true flux characteristics of accelerated deuterium ions by means of multigrid electrostatic analyzer of energy is presented. For energies 6-12 keV of the accelerated ions, the values of coefficients of secondary electron emission for a number of metal targets are obtained. The values correction factors for integrated flux of the accelerated deuterium ions, falling on metal targets, are determined. The quantitative values of the ionic and neutral components of the accelerated ion flux are received.

[5] B.A. Nechaev, G.N. Dudkin, V.N. Padalko, A.V. Petrov, V. Veretelnik, V.M. Bystritsky, V.V. Gerasimov, S.S. Parzycki, Vit.M. Bystritskii, and J. Wozniak. Parameters of the flow of accelerated particles generated by the ion source with closed drift of electrons. In B. Kovalchuk and G.Remnev, editors, 15-th SHCE Proceedings, pages 151-153, Tomsk, Russia, 2008. Publishing House of the IAO SB RAS. [15-th International Symposium on High Current Electronics, Tomsk, 21-26 Sept. 2008].
At measuring the yields of nuclear reactions dd, pd, etc. at ultra-low collision energies (2-6 keV in a centre-of-mass system) it is necessary to know the information about parameters of the flux of accelerated particles (ions of hydrogen, deuterium, ...) falling on the target (CD2, D2O, the metal saturated with hydrogen or deuterium). In particular, the important parameters are: energy distribution of the accelerated particles of the flux. In the given work are presented the experimental results got with the time-of-flight method on the efficiency of the accelerated particles flux transportation on 105 cm base and over 0-20o range, the particle flux composition, energy distribution of particles in the flux.

[6] V.M. Bystritsky, V.V. Gerasimov, and J. Wozniak. Measurement of helium-3 and deuterium stopping power ratio for negative muons. Eur. Phys. J. D, 42:79-84, 2007.
The measurement method and results measuring of the stopping power ratio of helium-3 and deuterium atoms for muons slowed down in the D/3He mixture are presented. Measurements were performed at four values of pure 3He gas target densities, φHe = 0.0337, 0.0355, 0.0359, 0.0363 (normalized to the liquid hydrogen density) and at a density 0.0585 of the D/3He mixture. The experiment was carried out at PSI muon beam μE4 with the momentum Pμ= 34.0 MeV/c. The measured value of the mean stopping ratio S^3He/D is 1.66 +- 0.04.

[7] G.N. Dudkin, B.A. Nechaev, V.N. Padalko, V.M. Bystritsky, J. Wozniak, V.I. Veretelnik, and E.G. Furman. Energy supply to the region of colliding plasma flows with opposite polarization fields. Technical Physics Letters, 33(3):235-238, 2007. (engl. transl from Pisma v JTF, 33, 6 (2007) 15-22).
The interaction of two colliding deuterium plasma flows propagating in opposite directions across the magnetic field and having opposite directions of the polarization fields has been experimentally studied. The plasma flows with densities up to 10(16) cm(-3) stop and a velocity of up to 2 x 10(7) stop cm/s were formed using discharges initiated in crossed E x H fields. Each discharge operated at an electric power of up to 300 mW and a discharge current up to 100 kA. The results of measurements of the equivalent capacitance of polarized plasma flows were used to estimate the transverse permittivity of plasma. The rate of depolarization in colliding flows was determined. The frequency and energy characteristics of a plasma LC circuit formed by colliding flows were estimated. The temporal modulation of plasma density in the flows was measured.

[8] L.D. Butakov, G.N. Dudkin, B.A. Nechaev, V.N. Padalko, A.V. Petrov, N.M. Polkovnikova, Vyach.M. Bystritsky, V.V. Gerasimov, A.R. Krylov, S.S. Parzhitski, Vit.M. Bystritskii, and J. Wozniak. Preliminary results of the study of the d(d,n)3He reaction in astrophysical energy region with the use of a plasma Hall accelerator. Bulletin of the Russian Academy of Sciences: Physics, 71:1640-1645, 2007. (engl. transl. from Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2007, Vol. 71, No. 11, pp. 1687-1692).
The possibility of using a plasma accelerator based on a pulsed Hall ion source to study the characteristics of pd, dd, d3He, 3He, and4He reactions in the astrophysical energy range (2 - 12 keV) has been considered. The preliminary experimental data on measurement of the astrophysical S factor for the dd reaction (dd -> 3He + n (2.5 MeV)) at average deuteron collision energies E col = 4.5 and 4.95 keV and the deuteron beam energy spread FWHM = 18% are reported. The found value of the S factor is in agreement with the results of the experiments carried out by us previously using linear plasma in the inverse Z-pinch configuration.

[9] Vyach.M. Bystritsky, Vit.M. Bystritskii, L.D. Butakov, V.V. Gerasimov, G.N. Dudkin, A.R. Krylov, B.A. Nechaev, V.N. Padalko, S.S. Parzhitski, A.V. Petrov, N.M. Polkovnikova, and J. Wozniak. Study of the reactions between light nuclei in the astrophysical energy using the plasma hall accelerator. In Proc. of XI International Seminar on Electromagnetic Interactions of Nuclei (EMIN-2006), Moscow, Sept. 21-24, 2006, pages 202-205, Moscow, 2007. INR RAS.
Using the plasma accelerator based on the pulse Hall ion source, the first measurements of the astrophysical S-factor of the d+d->3He+n reaction were performed for deuteron energies 9.1 and 9.9 keV. The observed values of the S-factor and effective cross sections σdd for dd reaction are in agreement with the results obtained by us earlier in the experiments at liner plasma accelerators (in configuration of both direct and inverse Z-pinch). The preliminary results have confirmed the fact that the proposed technique can be effective to study nuclear reactions between light nuclei in the astrophysical energy region.

[10] G.N. Dudkin, B.A. Nechaev, V.N. Padalko, V.M. Bystritsky, J. Wozniak, and V.I. Veretelnik. Investigation of the parameters of plasma dynamic electric energy storage. Izvestiya Vuzov, Physics, 50(10/2):175-178, 2007. (in russian).
The results of the investigations of two colliding deuterium plasma flows propagating in opposite directions across the magnetic field and having opposite directions of the polarization fields has been presented. The plasma flows with densities up to 1016 cm-3 stop and a velocity of up to 2·107 cm/s were formed using discharges initiated in crossed E x H fields. Each discharge operated at an electric power of up to 300 mW and a discharge current up to 100 kA. The rate of depolarization in colliding flows was determined. The frequency and energy characteristics of a plasma LC circuit formed by colliding flows were estimated. The temporal modulation of plasma density in the flows was measured.

[11] G.N. Dudkin, V.L. Kaminsky, B.A. Nechaev, V.N. Padalko, A.V. Petrov, N.M. Polkovnikova, E.N. Shuvalov, V.M. Bystritsky, V.V. Gerasimov, A.R. Krylov, S.S. Parzhitski, V.M. Bystritskii, J. Wozniak, and M. Filipowicz. Investigation of the d(d,n)3He reaction in deutron energy region 4-12 kev. Izvestiya Vuzov, Physics, 50(10/2):96-102, 2007. (in russian).
We discuss the possibility of using a plasma accelerator based on a pulsed Hall ion source to study the characteristics of pd, dd, and d3He reactions in the astrophysical energy range (2 - 12 keV). The preliminary experimental data on measurement of the astrophysical S-factor for the dd reaction (dd ->3He + n (2.5 MeV)) at the deuteron collision energies from the range 4 - 12 keV and the deuteron beam energy spread FWHM = 18% are reported. The found values of the S-factor are in agreement with the results of the experiments carried out by us previously using linear plasma in the inverse Z-pinch configuration.

[12] J. Wozniak, V.M. Bystritsky, and V.V. Gerasimov. Stopping of negative muons in helium-3 and deuterium. In Contribution to Int. Conf. on Muon Catalyzed Fusion Related Topics CF-07, Dubna, 18 - 21 June 2007, JINR Dubna, 2007. Abstract: http://theor.jinr.ru/ mcf07/abstracts/Wozniak.pdf.
Stopping power ratio of helium-3 and deuterium atoms for muons slowed down in the D/3He mixture was measured using 34.0 MeV/c muon beam at PSI meson factory. Four 3He targets with different gas densities and one D/3He target with helium atomic comcentration c = 0.05 were used. We present the measurement method and the analysis of experimental data. The measured value of the mean stopping ratio SHe/D is 1.66 +- 0.04.

[13] M. Filipowicz, V.M. Bystritsky, V.V. Gerasimov, and J. Wozniak. Measurement of pd fusion cycle parameters in solid H/D mixture. In Contribution to Int. Conf. on Muon Catalyzed Fusion Related Topics CF-07, Dubna, 18 - 21 June 2007, JINR Dubna, 2007. Abstract: http://theor.jinr.ru/ mcf07/abstracts/ Filipowicz1.pdf.
The final results of the μCF kinetics experimental study in solid hydrogen-deuterium mixtures at temperature 3K are presented. The experiment E742 has been carried out on the meson facility TRIUMF (Canada). The simultaneous analysis of the measured time distributions of pdμ molecule allowed to extract the values of the μCF chain parameters in H-D mixture: the fusion partial rates for different nuclear spin states of the pdμ molecule and the pdμ molecule formation rate.

[14] V.M. Bystritsky, M. Filipowicz, P. Knowles, F. Mulhauser, and J. Wozniak. Experimental study of the MCF processes in solid H/D and H/T mixtures and in gaseous D/3He mixture. In Contribution to Int. Conf. on Muon Catalyzed Fusion Related Topics CF-07, Dubna, 18 - 21 June 2007, JINR Dubna, 2007. Abstract: http://theor.jinr.ru/ mcf07/abstracts/ Bystritsky.pdf.
Methods and results of the two independent cycles of experiments performed at the meson factory TRIUMF (Canada) and PSI (Switzerland) and aimed at studying the μ-atomic and μ-molecular processes are reviewed. Application of the time-of-flight method and the solid hydrogen isotope mixture targets (H-D and H-T) at temperature 3 K in the TRIUMF experiments allowed obtaining for the first time a number of very important parameters of the muonic processes occuring in these mixtures. In PSI experiment the rate of the nuclear fusion in dμ3He has been measured for the first time.

[15] V.M. Bystritsky, Vit.M. Bystritskii, G.N. Dudkin, V.V. Gerasimov, M. Filipowicz, A.P. Kobzev, A.R. Krylov, B.A. Nechaev, V.N. Padalko, S.S. Parzhitski, A.V. Petrov, N.M. Polkovnikova, and J. Wozniak. Study of the reactions between light nuclei at ultralow energies using high power plasma accelerators. In Contribution to Int. Conf. on Muon Catalyzed Fusion Related Topics CF-07, Dubna, 18 - 21 June 2007, JINR Dubna, 2007. Abstract: http://theor.jinr.ru/ mcf07/abstracts/ Filipowicz2.pdf.
Measuring the astrophysical S-factors and cross sections of the reactions between light nuclei (pd,dd,d3He, and d6Li) allows to resolve many questions existing both in astrophysics and in nuclear physics. Research of the given processes in the ultralow energy region is rather problematic since intesity of the beams of the accelerated particles produced by classical accelerators are extremely low ( 1012 - 1013 s-1), and cross sections of these nuclear reactions in the astrophysical energy region are extremely small (10-39 - 10-33 cm2). An impetus to the current intensive study of indicated reactions has become the possibility of for these purposes using pulsed high-current plasma accelerators. Plasma accelerators with the liner plasma formation in the direct and inverse Z-pinch configuration and with closed Hall current pulse ion source allowed to receive the quantitative information on the astrophysical S-factors and effective cross sections of the pd and dd reactions (pd->4He+γ;dd-> 3He+n) in the energy region 2 - 12 keV. The results obtained indicate that, on the one hand, the technique proposed by us is worthy and can be effectively used to study nuclear reactions in the astrophysical energy region and, on the other hand, can be considered as a basis of the nuclear-physics diagnostics of plasma processes.

[16] F. Mulhauser, A. Adamczak, G. A. Beer, V. M. Bystritsky, M. Filipowicz, M. C. Fujiwara, T. M. Huber, O. Huot, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, G. M. Marshall, A. Olin, C. Petitjean, T. A. Porcelli, L. A. Schaller, V. A. Stolupin, J. Wozniak, and J. Zmeskal. Ramsauer-Townsend effect in muonic atom scattering. Phys. Rev. A, 73:034501, 2006. [ http ]
We present the final results of an experimental study of μd and mu t atom scattering in solid hydrogen cooled to 3 K. Strong effects resulting from the Ramsauer-Townsend effect have been observed in the TRIUMF experiment E742 where muons were stopped in thin frozen layers of hydrogen. The measured Ramsauer-Townsend minimum energy for both mu d and mu t atoms and the minimum cross section are in agreement with theory.

[17] V. M. Bystritsky, V. V. Gerasimov, and J. Wozniak. Measurement of helium-3 and deuterium stopping power ratio for negative muons. arXiv, nucl-ex/0607006, 2006. [ http ]
The measurement method and measuring results of the stopping power ratio of helium-3 and deuterium atoms for muons slowed down in the D/3He mixture are presented. Measurements were performed at four values of pure 3He gas target densities, &phiHe = 0.0337, 0.0355, 0.0359, 0.0363 (normalized to the liquid hydrogen density) and at a density 0.0585 of the D/3He mixture. The experiment was carried out at PSI muon beam μ E4 with the momentum Pμ =34.0 MeV/c. The measured value of the mean stopping ratio S^3He/D is 1.66 (+-0.04). This value can also be interpreted as the value of mean reduced ratio of probabilities for muon capture by helium-3 and deuterium atoms.

[18] V. M. Bystritsky, M. Filipowicz, V. V. Gerasimov, P. E. Knowles, F. Mulhauser, N. P. Popov, V. P. Volnykh, and J. Wozniak. Study of the nuclear fusion in a muonic dμ3He complex. Eur. Phys. J. D, 38:455-470, 2006. [ .html ]
An experimental study of the nuclear fusion reaction in the charge-asymmetrical dμ3He complex ( dμ3He -> &alpha ( 3.5 MeV) + p ( 14.64 MeV)) is presented. The 14.64 MeV protons were detected by three pairs of Si(dE-E) telescopes placed around the cryogenic target filled with D2 + 3He gas at 34 K. The 6.85 keV gamma rays emitted during the de-excitation of the dμ3He complex were detected by a germanium detector. The measurements were performed at two D2 + 3He target densities, &phi = 0.0585 and &phi = 0.168 ( relative to liquid hydrogen density) with an atomic concentration of 3He equal 0.0496. The values of the effective rate of nuclear fusion in dμ3He were obtained for the first time: λf = ( 4.5(- 2.0)(+2.6)) ×105 s-1 (&phi = 0.0585); &lambdaf = (6.9(- 3.0)(+3-6))×105 s-1 (&phi = 0.168). The J = 0 nuclear fusion rate in dμ3He was derived: &lambdaf(J=0) = (9.7(- 2.6)(+5.7))×105 s-1 (&phi = 0.0585); &lambdaf(J=0) = (12.4(-5.4)(+6.5))×105 s-1 (&phi = 0.168).

[19] V.M. Bystritsky, Vit.M. Bystritskii, T.L. Enik, M. Filipowicz, V.V. Gerasimov, V.M. Grebenyuk, A.P. Kobzev, R.V. Kublikov, V.V. Nesvizhevskii, S.S. Parzhitskii, V.N. Pavlov, N.P. Popov, A.V. Salamatin, V.N. Shvetsov, V.M. Slepnev, A.V. Strelkov, J. Wozniak, and N.I. Zamyatin. Experimental research of the radiative capture of thermal neutrons in 3He. Technical Report D15-2006-23, JINR, Dubna, 2006.
A project of an experiment on measurement of the cross sections of radiative thermal neutron capture by He-3 nuclei with production of one and two gamma quanta is presented.

[20] Vit. M. Bystritsky, V. M. Bystritskii, V. V. Gerasimov, G. N. Dudkin, A. R. Krylov, G. A. Mesyats, B. A. Nechaev, V. M. Padalko, S. S. Parzhitsky, F. M. Pen'kov, N. A. Ratakhin, S. A. Sorokin, V. A. Stolupin, and J. Wozniak. Application of inverse Z-pinch for study of the pd reaction at kev energy range. Nuclear Instruments and Methods A, 565(2):864, 2006. [ http ]
Formation and dynamics of the hydrogen liner, and nuclear reaction (pd ->3He + γ (5.5 MeV)) in the keV collision energy range were studied using the inverse Z-pinch configuration. The fundamental properties of light nuclei reactions in keV energy range are of importance for checking the validity of the models in basic physics and astrophysics. Two experimental techniques were proposed and tested for recovering the energy distribution of the protons in the expanding plasma liner. The first technique is based on the measuring the proton flow density, and the second on the measuring the H_α -plasma radiation of the exited neutrals in the expanding plasma liner. It is shown that the combined use of these two techniques could provide relevant information on the energy distribution of the accelerated protons in the liner. This approach was used to get the estimates of the upper limits for the astrophysical S-factor and effective cross section of the pd-reaction for proton-deuteron collisions in the energy range of 2.7-16.7 keV.

[21] M. Filipowicz, V. M. Bystritsky, P. E. Knowles, F. Mulhauser, and J. Wozniak. Method of Monte Carlo grid for data analysis. Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip., 547:652-662, 2005. [ http ]
This paper presents an analysis procedure for experimental data using theoretical functions generated by Monte Carlo. Applying the classical chi(2) fitting procedure for multiparameter systems is in some cases extremely difficult due to a lack of an analytical expression for the theoretical functions describing the system, The proposed algorithm is based on the least square method using a grid of Monte Carlo generated functions each corresponding to definite values of the minimization parameters. It is used for the E742 experiment (TRIUMF. Vancouver, Canada) data analysis with the aim to extract muonic atom scattering parameters on solid hydrogen.

[22] G. N. Dudkin, B. A. Nechaev, V. N. Padalko, V. M. Bystritsky, V. V. Gearsimov, R. V. Kublikov, S. S. Parzhitski, V. A. Stolupin, J. Wozniak, V. I. Veretelnik, and E. G. Furman. Neutron emission induced by the plasma beams collision in the external magnetic field. Plasma Physics Reports, 31(12):1039-1047, 2005. [ http ]
Results are presented from experimental studies of the neutron emission generated in the collision of deuterium plasma flows produced in discharges in crossed E H fields and propagating in opposite directions in a neutral gas across an external magnetic field. It is shown that the interaction of oppositely propagating deuterium plasma flows gives rise to the generation of soft X-ray emission and neutron emission from the dd reaction (dd -> 3He + n) and is accompanied by an almost complete depolarization of the flows and rapid variations in the magnetic field (at a rate of 1011 G/s). The measurements were performed at energies and velocities of the flows of up to 600 J and 3.5×107 cm/s, respectively. The plasma density in each flow was  1015 cm-3. The upper estimates for the astrophysical S factor and the effective cross sections of the dd reaction obtained from our measurements are compared to theoretical calculations and to the results of experiments performed in the MIG high-current accelerator (Institute of High-Current Electronics, Russian Academy of Sciences, Tomsk).

[23] V. M. Bystritsky, V. M. Bystritskii, G. N. Dudkin, V. V. Gerasimov, A. R. Krylov, G. A. Mesyats, B. A. Nechaev, V. M. Padalko, S. S. Parzhitsky, F. M. Pen'kov, N. A. Ratakhin, and J. Wozniak. Study of the pd reaction at ultralow energies using hydrogen liner plasma. Phys. Atom. Nuclei, 68:1777-1786, 2005. [ http ]
The pd reaction (pd -> He-3 + gamma (5.5 MeV)) is studied in the astrophysical energy collision range of protons with deuterons using the hydrogen liner in the inverse Z-pinch Configuration at the Pulsed power generator MIG (HCEI, Tomsk). Fundamental characteristics of this and other light-nucleus reactions at ultralow energies are important for problems of basic physics and astrophysics. The knowledge of the energy distribution of the nuclei participating in these reactions is important due to their exponential type of dependence on the collision energy. Two experimental techniques were designed and tested for recovering the energy distribution Of liner protons incident on the CD2 target by using optical detectors and ion collectors. It is shown that the combined use of these two techniques could provide relevant information on the energy distribution of the accelerated protons in the liner. The estimates of the upper limits for the astrophysical S factor and effective cross section of the pd reaction in the proton-deuteron collision energy range of 2.7-16.7 keV are obtained.

[24] V. M. Bystritsky, J. Wozniak, V. V. Gerasimov, G. N. Dudkin, R. V. Kublikov, B. A. Nechaev, V. M. Padalko, S. S. Parzhitskii, and V. S. Smirnov. Scintillation detectors for experiments on plasma accelerators. Instrum. Exp. Tech., 48:764-771, 2005. [ http ]
The properties of photomultiplier tubes operating in the gating mode as components of scintillation detectors were investigated in high-power pulsed electromagnetic and nuclear radiation fields. Photomultiplier tubes with Venetian blind and linear focused dynode systems were considered. The diagrams of the gating circuits for the photomultipliers based on high-voltage dividers of the active and resistor types are presented. The results of our investigations are significant for a large number of experiments involving discrimination in time between the preceding background radiation and the useful signal.

[25] V. M. Bystritsky, V. F. Boreiko, W. Czaplinski, M. Filipowicz, V. V. Gerasimov, O. Huot, P. E. Knowles, F. Mulhauser, V. N. Pavlov, N. P. Popov, L. A. Schaller, H. Schneuwly, V. G. Sandukovsky, V. A. Stolupin, V. P. Volnykh, and J. Wozniak. Experimental study of μ -atomic and μ -molecular processes in pure helium and deuterium-helium mixtures. Phys. Rev. A, 71:032723, 2005. [ http ]
We present experimental results of μ -atomic and μ -molecular processes induced by negative muons in pure helium and heliumdeuterium mixtures. The experiment was performed at the Paul Scherrer Institute (Switzerland). We measured relative intensities of muonic x-ray K series transitions in (μ 3,4He)* atoms in pure helium as well as in helium - deuterium mixtures. The d μ3He radiative decay probabilities for two different helium densities in D2+He-3 mixture were also determined. Finally, the q1s(He) probability for a dμ atom formed in an excited state to reach the ground state was measured and compared with theoretical calculations using a simple cascade model.

[26] Vit. M. Bystritsky, V. M. Bystritskii, J. Wozniak, V. V. Gerasimov, G. N. Dudkin, A. R. Krylov, G. A. Mesyats, B. A. Nechaev, V. M. Padalko, S. S. Parzhitsky, F. M. Pen'kov, N. A. Ratakhin, S. A. Sorokin, and V. A. Stolupin. Dynamics of hydrogen liner formation in the inverse Z-pinch configuration at the MIG accelerator. first results of pd-reaction study. In G.Mesyats V.Engelko and V.Smirnov, editors, Proceedings of the 5-th Int. Conf. on High-Power Particle Beams (BEAMS'2004), pages 718-721, 2005. [St. Petersburg, July 18-23, 2004].
Dynamics of formation and evolution of the hydrogen liner in the inverse Z-pinch configuration, and nuclear reaction pd -> 3He + 5.5 MeV gamma ray in the ultra low energy range of collision energies were studied at the pulsed power generator MIG. The upper limits for the astrophysical S-factor and effective cross section of the pd reaction in the proton-deuteron collision energy range of 2.7 - 16.7 keV have been obtained.

[27] G.N. Dudkin, B.A. Nechaev, V.N. Padalko, V.M. Bystritsky, V.V. Gerasimov, S.S. Parzhitski, V.A. Stolupin, and J. Wozniak. Search of interaction processes of plasma opposing fluxes. In B.Kovalchuk and G.Remnev, editors, Proceedings of the 13th International Symposium on High Current Electronics, pages 387-389, 2004. [25-30 July, 2004, Tomsk, Russia].
in russian

[28] V.M. Bystritsky, G.N. Dudkin, V.V. Gerasimov, R.V. Kublikov, B.A. Nechaev, V.N. Padalko, S.S. Parzhitski, V.S. Smirnov, V.A. Stolupin, and J. Wozniak. Scintillation detectors in the nuclear and electromagnetic radiations powerful pulsed fields. In B.Kovalchuk and G.Remnev, editors, Proceedings of the 13th International Symposium on High Current Electronics, pages 203-206, 2004. [25-30 July, 2004, Tomsk, Russia].
The results are presented of the investigation of the designed gating circuits to operate the photomultipliers work of the scintillation detectors in electromagnetic and nuclear radiation powerful pulsed fields. Here are considered two variants of high-voltage dividers (HVD) PMT: a resistive and a transistor ones. The experimental data are actual for the wide range of experiments with the essential suppression of the scintillation detector intensive background load during the time interval of ”useful” events detection. The designated gating PMT circuits could be succesfully used while studying rare processes at a high-intensity background process level.

[29] V. M. Bystritsky, V. F. Boreiko, M. Filipowicz, V. V. Gerasimov, O. Huot, P. E. Knowles, F. Mulhauser, V. N. Pavlov, L. A. Schaller, H. Schneuwly, V. G. Sandukovsky, V. A. Stolupin, V. P. Volnykh, and J. Wozniak. Muon capture by 3He nuclei followed by proton and deuteron production. Physical Review A, 69(1):012712, 2004. [ http ]
The paper describes an experiment aimed at studying muon capture by 3He nuclei in pure 3He and D2+3He mixtures at various densities. Energy distributions of protons and deuterons produced are measured for the energy intervals 10-49 MeV and 13-49 MeV, respectively. Muon capture rates are obtained using two different analysis methods. The experimental differential capture rates are compared with theoretical calculations performed using the plane-wave impulse approximation with the realistic nearest-neighbor interaction Bonn B potential. Extrapolation to the full energy range yields total proton and deuteron capture rates in good agreement with former results

[30] Vyach.M. Bystritsky, V.V. Gerasimov, S.S. Parzhitski, V.A. Stolupin, Vit.M. Bystritskii, J. Wozniak, E.N. Volkov, N.A. Ratakhin, S.A. Sorokin, G.N. Dudkin, B.A. Nechaev, V.N. Padalko, and G.A. Mesyats. Hydrogen inverse Z-pinch on high-current generator MIG. In B.Kovalchuk and G.Remnev, editors, Proceedings of the 13th International Symposium on High Current Electronics, pages 393-396, 2004. [25-30 July, 2004, Tomsk, Russia].
in russian

[31] J. Wozniak, A. Adamczak, G. A. Beer, V. M. Bystritsky, M. Filipowicz, M. C. Fujiwara, T. M. Huber, O. Huot, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, G. M. Marshall, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, L. A. Schaller, V. A. Stolupin, and J. Zmeskal. Scattering of pμ muonic atoms in solid hydrogen. Physical Review A, 68(6):62502-1-14, 2003. [ http ]
We present the results of experimental and theoretical study of the scattering of low-energy pμ atoms in solid hydrogen cooled to 3 K. Strong effects resulting from the solid state interactions have been observed in the TRIUMF experiment E742 where muons were stopped in thin frozen layers of hydrogen. The resulting emission of low-energy p μ atoms from the hydrogen layer into the adjacent vacuum was much higher than that predicted by calculations which ignored the solid nature of the hydrogen. New differential scattering cross sections have been calculated for the collisions of pμ atoms on solid hydrogen to account for its quantum crystalline nature. Analysis of the experimental data performed using such cross sections shows the important role of the coherent scattering in pμ atom diffusion. For pμ energies lower than the Bragg cutoff limit ( approximately=2 meV) the elastic Bragg scattering vanishes which makes the total scattering cross section fall by several orders of magnitude, and thus the hydrogen target becomes transparent allowing the emission of cold pμ atoms to occur. (53 References).

[32] G. N. Dudkin, B. A. Nechaev, V. N. Padalko, V. M. Bystritsky, V. A. Stolupin, V. M. Bystritskii, and J. Wozniak. Generation and interaction of intense counterpropagating plasma flows. Plasma Physics Reports, 29(8):657-63, 2003. [ http ]
Results are presented from experimental studies of the parameters of two counterpropagating (colliding) plasma flows generated by discharges in crossed electric and magnetic fields. It is shown that the conversion efficiency of the energy deposited in the discharges into the energy of directed plasma flows is 0.3-0.6. For discharge current pulses with a duration of approx. 10 μ s, the energy flux density in the plasma flow reaches approx. 10 J/cm2 and the total energy of the flows is on the order of 300 J. The density of deuterons in flows is approx. 1015 cm-3 , and the flow velocity is <=2×107 cm/s. The total number of particles carried by flows is about 1019. The possibility of using counterpropagating plasma flows to study reactions involving light nuclei (dd, pd, dt, and d-He reactions) in the range of ultralow collision energies is discussed. (12 References).

[33] Vyach. M. Bystritsky, V. V. Gerasimov, A. R. Krylov, S. S. Parzhitski, F. M. Pen'kov, O. M. Shvyryaev, V. A. Stolupin, G. N. Dudkin, B. A. Nechaev, V. M. Padalko, J. Wozniak, G. A. Mesyats, Vit. M. Bystritskii, V. I. Makhrin, and N. A. Ratakhin. Measurement of the astrophysical S factor for dd interaction at ultralow deuteron-collision energies using the inverse Z pinch. Physics of Atomic Nuclei, 66(9):1683-90, 2003. [transl. from Yadernaya Fizika, 66, 9 (2003) 1731]. [ http ]
This paper is devoted to measurement of the astrophysical S factor and cross sections of the d + d -> 3He + n reaction at ultralow deuteron-collision energies. Formation of the flow of the accelerated deuterons incident on the CD2 solid-state target was made within the scheme of the inverse Z pinch. The liner in the initial state was a hollow supersonic deuterium jet of radius of 15 mm and length of 20 mm. The experiment was carried out at the pulsed high-current accelerator (I = 950 kA, &tau = 80 ns) of the Institute of High-Current Electronics (Tomsk, Russia). Measurement of the deuteron energy distribution was performed through an analysis of the time distributions of the intensity of the liner radiation (H&alpha and H&beta lines) generated during the liner radial movement from the axis. Recording of this radiation was carried out by optical detectors placed along the direction of the liner moving from its axis. The measured value of the astrophysical S factor for the dd reaction at the average deuteron collision energy E = 3.69 keV was equal to S(E = 3.69 keV) = 58.2 +- 18.1 keV b. The dd-reaction cross section calculated using the found value of the S factor and known representation of the reaction cross section as the product of the barrier factor and the astrophysical S factor was &sigma dd(E = 3.69 keV) = (1.33 +- 0.41) 10-30 cm2.

[34] V. M. Bystritskii, V. M. Bystritsky, J. Wozniak, V. M. Grebenyuk, E. Gula, G. N. Dudkin, G. A. Mesyats, B. A. Nechaev, V. N. Padalko, S. S. Parzhitski, F. M. Pen'kov, N. A. Ratakhin, S. A. Sorokin, and VA. Stolupin. Deuterium liner and multiparametric studies of the formation of an inverse Z-pinch. Technical Physics, 47(9):1098-1105, 2002. [ http ]
A method and results of measurements are presented of the ion energy distribution in a deuterium liner accelerated in the inverse Z-pinch, in which the plasma is accelerated electrodynamically from the liner axis. Knowledge of the deuteron energy distribution is of primary importance for the correct interpretation of the experimental results from the study of the dd-reaction in the range of infralow energies with the use of a liner plasma. Experiments were carried out in a high-current pulsed accelerator (I=950 kA, &tau =80 ns) at the Institute of High-Current Electronics of the Siberian Division of the Russian Academy of Sciences (Tomsk, Russia). In the initial state, the liner is a supersonic hollow deuterium jet 32 mm in diameter and 20 mm in length. The liner parameters were measured with the help of optical detectors of H&alpha and H&beta deuterium lines and magnetic probes arranged in a radial direction (along the direction the liner expansion). In addition, scintillation spectrometers and BF3 counters were used to measure the intensity of the neutron flux produced in the d+d to 3He+n reaction. The results obtained by simultaneously analyzing the data from magnetic probes, optical detectors, and neutron detectors point to the possibility of using a rather simple method for measuring the parameters of the liner accelerated up to energies of 3-6 keV. (16 References).

[35] V. F. Boreiko, V. M. Bystritsky, V. M. Grebenyuk, A. I. Vanov, A. I. Kalinin, A. R. Krylov, S. S. Parzhitsky, V. M. Slepnev, V. A. Stolupin, and J. Wozniak. 3He detectors in experiments at powerful pulsed accelerators. Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors & Associated Equipment, 490(1-2):344-55, 2002. [ http ]
A possibility of using a thermal neutron detector in the high gamma -quantum and bremsstrahlung fields is considered in the paper. The design of the thermal neutron detector consisting of 10 counters filled with 3He under a pressure of 2 atm and enclosed in a polyethylene moderator is described. The results of measuring the neutron recording efficiency and neutron lifetimes by this detector exposed to a neutron flux from the dt-reaction and from Cf-252 and Pu-Be sources are reported. The thicknesses of the polyethylene moderator and the Pb layer used for suppression of the background in the fields of powerful electromagnetic radiation are optimized. (18 References).

[36] J. Wozniak. Strong interactions between light nuclei at low energies. In V. G. Kadyshevski, A. N. Sisakyan, and A. Hrynkiewicz, editors, Collaboration between JINR and Institutes and Universities of Poland, pages 48-54. JINR, Dubna, 2001. [JINR Coordination Committee Meeting, January 18 - 19, 2001, Dubna].
The actual investigations in the frame of Cracow-Dubna collaboration are reviewed: a) nuclear fusion in dμ3He muonic complex, b) scattering of muonic atoms in hydrogen, c) measuring cross sections of nuclear fusion reactions at low collision energy using Z-pinch technique.

[37] F. Mulhauser, A. Adamczak, G. A. Beer, V. M. Bystritsky, M. Filipowicz, M. C. Fujiwara, T. M. Huber, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, A. Olin, C. Petitjean, T. A. Porcelli, V. A. Stolupin, J. Wozniak, and J. Zmeskal. Ramsauer-Townsend effect in solid hydrogen. Hyperfine Interactions, 138(1-4):41-6, 2001. [RIKEN Conference on Muon Catalyzed Fusion and Related Exotic Atoms (MuCFO1). Shimoda, Japan. 22-26 April 2001]. [ http ]
The TRIUMF E742 experiment has measured the energy dependence of the scattering cross-sections of muonic deuterium and tritium on hydrogen molecules for collisions in the energy range 0.1-45 eV. The experimental setup permits the creation of muonic atom ( dμ or tμ) beams. The multilayered target system gives the possibility to choose the type of interactions to study and to isolate a particular interaction. The scattering of dμ or tμ beams on H2 is analyzed via the muon transfer reaction to neon. The time-of-flight method is used to measure the scattering cross section as a function of the energy of the muonic atom beam. The results are compared, using Monte Carlo simulations, with theoretical calculations which have been recently performed with high accuracy. (19 References).

[38] P. E. Knowles, V. M. Boreiko, V. M. Bystritsky, M. Filipowicz, O. Huot, F. Mulhauser, V. N. Pavlov, F. M. Penkov, C. Petitjean, N. P. Popov, V. G. Sandukovsky, L. A. Schaller, H. Schneuwly, V. A. Stolupin, and J. Wozniak. Experimental search for μ d 3He fusion. Hyperfine Interactions, 138(1-4):289-94, 2001. [RIKEN Conference on Muon Catalyzed Fusion and Related Exotic Atoms (MuCFO1). Shimoda, Japan. 22-26 April 2001]. [ http ]
The vast majority of muon catalyzed fusion research has been concerned with muonic molecules of hydrogen isotopes only, since the dynamics of higher-Z muonic atoms in general preclude the formation of molecular systems. In the specific case of hydrogen-helium mixtures, bound muonic molecular states can exist, and thus it is possible to search for the reaction dμ 3He -> μ + &alpha (3.66 MeV) + p (14.64 MeV). Until recently, the theoretical predictions for the nuclear fusion rate in the dμ 3He molecule, &lambdaf , ranged over one order of magnitude, from 105 to 106 per second. An experimental upper limit has been measured for &lambdaf in HD + 3He giving a value < 6×104 s-1. We report on the analysis of an experiment in D2 + 3He which has shown a signal coming either from the muon catalyzed reaction, or from the fusion in flight of 3He's formed from dμ d fusion. (7 References).

[39] M. C. Fujiwara, A. Adamczak, J. M. Bailey, G. A. Beer, J. L. Beveridge, M. P. Faifman, T. M. Huber, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, V. E. Markushin, G. M. Marshal, G. R. Mason, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, J. Wozniak, and J. Zmeskal. Resonant scattering of muonic hydrogen atoms and dynamics of the muonic molecular complex. Hyperfine Interactions, 138(1-4):245-8, 2001. [RIKEN Conference on Muon Catalyzed Fusion and Related Exotic Atoms (MuCFO1). Shimoda, Japan. 22-26 April 2001]. [ http ]
Resonant scattering of muonic hydrogen atoms via back decay of the molecular complex, a key process in the understanding of epithermal muonic molecular formation, is analyzed. The limitations of the effective rate approximation are discussed and the importance of the explicit treatment of the back decay is stressed. An expression of the energy distribution for the back-decayed atoms is given. (13 References).

[40] V. Bystritsky, G. Dudkin, V. Grebenyuk, E. Gula, B. Nechaev, V. Padalko, S. Parzhitski, F. Pen'kov, N. Ratakhin, S. Sorokin, V. Stolupin, J. Wozniak, and V. Bystritskii. Measurement of the deuterium liner characteristics in the inverse Z-pinch configuration. In R. Reinovsky and M. Newton, editors, PPPS-2001 Pulsed Power Plasma Science 2001. 8th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference. Digest of Papers, volume 2, pages 1031-4. IEEE. Piscataway, NJ, USA, 2001. [PPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference. Digest of Technical Papers. Las Vegas, NV, USA. Plasma Sci. & Appl. Committee. Pulsed Power Sci. & Technol. Committee of the IEEE Nucl. & Plasma Sci. Soc. 17-22 June 2001].
This work is a part of a continuing research on measuring dd- reaction cross sections in keV energy range using accelerated ion flow in the liner of the Z-pinch generator. The knowledge of the ions energy distribution in the accelerated liner is crucially important for calculation of cross section. Diagnostics and the first results on the measurement of the energy distribution of the liner ions in the inverse Z-pinch geometry are described. Experiments were fulfilled in HCEI (Tomsk, Russia) at the nanosecond pulsed generator of 1 MA, 80 ns pulse. The spatially and time resolved liner dynamics and its radiation were measured with a set of light detectors (LDs), placed at various radii registering H/sub alpha / and H/sub beta / deuterium lines, and with B-dot probes, measuring the dynamics of the current carrying plasma liner. Processing of the LDs signal waveforms based on assumption of ordered ion flow between the LDs provided compatible information on the ion energy distribution. The neutron TOF measurements provided data on the high energy deuterons flows, responsible for the main neutron output. These experiments substantiate potential of using optical plasma diagnostic, which in combination with conventional electro-physical and neutron diagnostics could significantly improve reliability of dd-reaction cross-section measurement. (5 References).

[41] V. M. Bystritsky, A. Adamczak, G. A. Beer, M. Filipowicz, M. C. Fujiwara, T. M. Huber, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, V. A. Stolupin, J. Wozniak, and J. Zmeskal. Generation of the ultracold muonic hydrogen flux. Hyperfine Interactions, 138(1-4):47-53, 2001. [RIKEN Conference on Muon Catalyzed Fusion and Related Exotic Atoms (MuCFO1). Shimoda, Japan. 22-26 April 2001]. [ http ]
We present the study of pμ atom scattering in solid hydrogen. Anomalously large emission of E <=1.9 meV pμ 's from a solid H2 layer was observed for the first time. This three times greater pμ atom yield is due to non-elastic phonon scattering. As a result, it becomes possible to generate an ultracold flux of pμ atoms. The recent calculations of the total and differential cross sections agree with all experimental results of pμ atom scattering in solid hydrogen. (11 References).

[42] V. Bystritskii, V. Bystritsky, S. Chaikovsky, M. Filipowicz, V. Grebenyuk, E. Gula, V. Makhrin, G. Mesyats, S. Parzhitski, F. Pen'kov, N. Ratakhin, V. Sinebryukhov, S. Sorokin, V. Stolupin, E. Volkov, and J. Wozniak. The astrophysical S-factor for dd-reactions at keV-energy range. Kerntechnik, 66(1-2):42-6, 2001.
The experimental results of measurements of the astrophysical S-factor for dd-reaction at keV-energy range collision energies using liner plasma technique are presented. The experiments were carried out at the high current generator of the Institute of High-Current Electronics in Tomsk, Russia. The measured values of the S-factors for the deuteron collision energies 1.80, 2.06 and 227 keV are S = (114+-68), (64+-30), (53+-16) b.keV, respectively. The corresponding cross sections for dd-reactions, described as a product of the barrier factor and measured astrophysical S-factor, are &sigma (E=1.80 keV)=(4.3+-2.6).10-33 cm2; &sigma (E=2.06 keV)=(9.8+-4.6).10 -33 cm2; &sigma (E=2.27 keV)=(2.1+-0.6).10-32 cm2. (36 References).

[43] V. M. Bystritskii, V. M. Bystritsky, S. A. Chaikovsky, M. Filipowicz, V. M. Grebenyuk, E. Gula, V. I. Makhrin, G. A. Mesyats, S. S. Parzhitski, F. M. Pen'kov, N. A. Ratakhin, V. A. Sinebryukhov, S. A. Sorokin, V. A. Stolupin, E. N. Volkov, and J. Wozniak. Astrophysical S factor for dd interaction at ultralow energies. Physics of Atomic Nuclei, 64(5):855, 2001. [ http ]
Experimental results are presented that were obtained by measuring the astrophysical S factor for dd interaction at very low deuteron collision energies by using the liner-plasma technique. (38 References).

[44] M. Augsburger, V. M. Boreiko, V. M. Bystritsky, W. Czaplinski, A. Del Rosso, C. Donche-Gay, M. Filipowicz, O. Huot, P. Knowles, F. Mulhauser, V. N. Pavlov, F. M. Pen'kov, C. Petitjean, N. P. Popov, V. G. Sandukovsky, L. A. Schaller, H. Schneuwly, V. A. Stolupin, and J. Wozniak. Measuring μ d 3He fusion. PSI Scientific Report 2000, Volume I:21, 2001.
missing

[45] M. C. Fujiwara, A. Adamczak, J. M. Bailey, G. A. Beer, J. L. Beveridge, M. P. Faifman, T. M. Huber, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, C. J. Martoff, G. R. Mason, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, J. Wozniak, and J. Zmeskal. Resonant formation of d μ t molecules in deuterium: an atomic beam measurement of muon catalyzed dt fusion. Physical Review Letters, 85(8):1642-5, 2000. [ http ]
Resonant formation of d μ t molecules in collisions of muonic tritium ( tμ) on D2 was investigated using a beam of tμ atoms, demonstrating a new direct approach in muon catalyzed fusion studies. Strong epithermal resonances in d μ t formation were directly revealed for the first time. From the time-of-flight analysis of 2036+-116 dt fusion events, a formation rate consistent with 0.73+-(0.16) meas+-(009)model times the theoretical prediction was obtained. For the largest peak at a resonance energy of 0.423+-0.037 eV, this corresponds to a rate of (7.1+-1.8)*109 s-1, more than an order of magnitude larger than those at low energies. (26 References).

[46] V. M. Bystritsky, V. M. Grebenyuk, S. S. Parzhitsky, F. M. Pen'kov, V. A. Stolupin, G. A. Mesyats, V. I. Makhrin, N. A. Ratakhin, V. A. Sinebryukhov, E. N. Volkov, V. M. Bystritskii, M. Filipovicz, J. Wozniak, E. Gula, G. N. Dudkin, B. A. Nechaev, and VN. Padalko. Inverse Z-pinch in fundamental investigations. Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors & Associated Equipment, 455(3):706-14, 2000. [ http ]
This paper is devoted to examination of the possibility of using a deuterium inverse Z-pinch for investigation of the dd reaction at ultralow deuterium collision energies. The experiment was carried out at the Institute of High-Current Electronics (Tomsk) using the high current accelerator (the current pulse amplitude is 850 kA, the high-voltage pulse duration is ˜80 ns). The characteristic data of the deuterium liner accelerated by the inverse Z-pinch process up to (2.8-7.2)*107 cm/s were measured for the first time. The type and values of gamma and neutron radiation that occurred during liner acceleration process were examined. The application of fast scintillator neutron detectors with definite size and a deuterium target located at distances more than 140 mm from the liner axis was demonstrated to allow reliable time separation of useful events from background events. (23 References).

[47] V. M. Bystritsky, V. M. Grebenyuk, S. S. Parzhitski, F. M. Pen'kov, V. T. Sidorov, V. A. Stolupin, T. L. Bulgakov, G. A. Mesyats, A. A. Sinebryukhov, V. A. Sinebryukhov, S. A. Chaikovsky, A. V. Luchinsky, V. I. Makhrin, N. A. Ratakhin, S. A. Sorokin, V. M. Bystritskii, M. Filipowicz, J. Wozniak, and E. Gula. Experimental investigation of dd reaction in range of ultralow energies using Z-pinch. Laser & Particle Beams, 18(2):325-33, 2000. [ http ]
Experimental results on measurement of dd-reaction cross sections in the energy range of 0.1-1.5 keV using the Z-pinch technique are presented. The experiment was fulfilled at the high current generator of the High-Current Electronics Institute, city of Tomsk, Russia. The dd-fusion neutrons were registered by time-of-flight scintillator detectors and BF3 detectors of thermal neutrons. The estimates were obtained at 90% of the confidence level for the upper limits of the neutron-producing dd-reaction cross sections for average deuteron collision energies of 0.11, 0.34, 0.37 and 1.46 keV. These results substantiate feasibility to get a cross section magnitude for dd-reaction in the range of the collision energy of 0.8-3 keV using similar technology at the pulse current level of 2-3 MA. (53 References).

[48] M. Augsburger, V. M. Boreiko, V. M. Bystritsky, W. Czaplinski, A. Del Rosso, C. Donche-Gay, M. Filipowicz, O. Huot, P. Knowles, F. Mulhauser, V. N. Pavlov, F. M. Pen'kov, C. Petitjean, N. P. Popov, V. G. Sandukovsky, L. A. Schaller, H. Schneuwly, V. A. Stolupin, and J. Wozniak. Measuring μ d 3He fusion. PSI Scientific Report 1999, Volume I:16, 2000.
missing

[49] J. Wozniak, A. Adamczak, G. A. Beer, V. M. Bystritsky, M. Filipowicz, M. C. Fujiwara, T. M. Huber, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, V. A. Stolupin, and J. Zmeskal. New effects in low energy scattering of p μ atoms. Hyperfine Interactions, 119(1-4):63-9, 1999. [International Symposium on Exotic Atoms, Molecules and Muon Catalyzed Fusion (EXAT 98). Ascona, Switzerland. 19-24 July 1998]. [ http ]
Strong solid state effects in low energy scattering of pμ atoms in solid hydrogen are reported and analyzed. Such effects have been observed in TRIUMF experiment E742 where muons are stopped in thin frozen (3 K) layers of hydrogen. Emission of low energy pμ atoms from the hydrogen layer into adjacent vacuum was much higher than expected, based on calculations which ignored the solid nature of hydrogen. Monte Carlo simulations, performed using the scattering cross-sections with solid state effects taken into account, show the important role of the coherent elastic Bragg scattering in the diffusion of pμ atoms. For pμ energies lower than the Bragg cut-off limit (˜2 meV) the total scattering cross-section falls by several orders of magnitude, the hydrogen target becomes transparent and the emission of cold pμ atoms takes place. (20 References).

[50] J. Wozniak. FOW Code. University of Mining and Metallurgy, Cracow, 1999. (unpublished).
missing

[51] A. Del Rosso, M. Augsburger, C. Donche-Gay, O. Huot, P. Knowles, F. Mulhauser, L. A. Schaller, H. Schneuwly, V. F. Boreiko, V. M. Bystritsky, V. N. Pavlov, F. M. Pen'kov, V. I. Sandukovsky, V. A. Stolupin, C. Petitjean, N. P. Popov, W. Czaplinski, M. Filipowicz, and J. Wozniak. Progress report for PSI experiment R-98-02: Measuring the μd3He fusion. Progress Report to PSI Proposal, R-98-02, 1999. [unpublished].
After the June 1998 approval of our Proposal R-98-02, we imptoved our experimental set up with new detectors, a new data acquisition system and more complex electronics. New Monte Carlo simulations have been performed and the results give a better understanding of different parameters such as detector efficiencies, muon stopping distribution and energy losses in our detectors. Detais about the changes, the status of the ongoing analysis as well as plans for the foreseen 1999 run period are presented and discussed here.

[52] A. Del Rosso, O. Huot, R. Jacot-Guillarmod, F. Mulhauser, L. A. Schaller, H. Schneuwly, Y.-A. Thalmann, S. Tresh, V. F. Boreiko, V. M. Bystritsky, S. V. Dovgun, A. N. Fedorov, V. N. Pavlov, F. M. Pen'kov, V. I. Sandukovsky, V. A. Stolupin, C. Petitjean, N. P. Popov, M. Filipowicz, and J. Wozniak. Measuring μd 3He fusion. PSI Scientific Report 1998, Volume I:21, 1999.
missing

[53] A. Olin, A. Adamczak, G. A. Beer, V. M. Bystritsky, M. Filipowicz, M. C. Fujiwara, T. M. Huber, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, F. Mulhauser, C. Petitjean, T. A. Porcelli, V. A. Stolupin, J. Wozniak, and J. Zmeskal. Study of μ -catalyzed fusion in H-D mixtures. Hyperfine Interactions, 118(1-4):163-70, 1999. [International Symposium on Exotic Atoms, Molecules and Muon Catalyzed Fusion (EXAT 98). Ascona, Switzerland. 19-24 July 1998]. [ http ]
Muon-catalyzed fusion was first observed in the pd μ system, and remains a good test of our understanding of the underlying molecular and nuclear processes. In contrast to the ddμ and dtμ systems, no resonant behavior is expected, which considerably simplifies the dynamics. We will discuss data taken with solid H-D mixtures of 0.05%, 2%, 15% and 75% D2. In these measurements we observed simultaneously muons from pdμ-> μ + 3He and gammas from pdμ-> μ3He + γ. A simulation code incorporating the relevant physics processes has been developed for the analysis of this data. Preliminary results are presented for the fusion and molecular formation rates. This new data stringently tests the currently-accepted fusion scheme. A new value of the astrophysical S-factor is derived. (18 References).

[54] F. Mulhauser, A. Adamczak, G. A. Beer, V. M. Bystritsky, M. Filipowicz, M. C. Fujiwara, T. M. Huber, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, A. Olin, C. Petitjean, T. A. Porcelli, V. A. Stolupin, J. Wozniak, and J. Zmeskal. Scattering of muonic hydrogen atoms. Hyperfine Interactions, 119(1-4):35-44, 1999. [International Symposium on Exotic Atoms, Molecules and Muon Catalyzed Fusion (EXAT 98). Ascona, Switzerland. 19-24 July 1998]. [ http ]
Our measurement compares the energy dependence of the scattering cross-sections of muonic deuterium and tritium on hydrogen molecules for collisions in the energy range 0.1-45 eV. A time-of-flight method was used to measure the scattering cross-section as a function of the muonic atom beam energy and shows clearly the Ramsauer-Townsend effect. The results are compared with theoretical calculations by using Monte Carlo simulations. The molecular pdμ and ptμ formation creates background processes. We measure the formation rates in solid hydrogen by detecting the 5.5 MeV (pdμ ) and 19.8 MeV (ptμ ) gamma -rays emitted during the subsequent nuclear fusion processes. (34 References).

[55] T. M. Huber, A. Adamczak, J. M. Bailey, G. A. Beer, J. L. Beveridge, B. P. Ellerbusch, M. C. Fujiwara, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, G. J. Lindquist, M. Maier, V. E. Markushin, G. M. Marshall, C. J. Martoff, G. R. Mason, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, J. Wozniak, and J. Zmeskal. Time-of-flight studies of emission of μ t from frozen hydrogen films. Hyperfine Interactions, 118(1-4):159-61, 1999. [International Symposium on Exotic Atoms, Molecules and Muon Catalyzed Fusion (EXAT 98). Ascona, Switzerland. 19-24 July 1998]. [ http ]
In recent TRIUMF experiments, a μ- beam is stopped in a solid hydrogen film with a small fraction of T2. The Ramsauer-Townsend (RT) mechanism allows tμ to escape into vacuum with a few eV of energy. To study the emission process, an imaging system was used to determine the position of muon decays. Experimental histograms are in good agreement with a Monte Carlo simulation. (6 References).

[56] M. C. Fujiwara, A. Adamczak, J. M. Bailey, G. A. Beer, J. L. Beveridge, M. P. Faifman, T. M. Huber, R. Jacot-Guillarmod, P. Kammel, S. K. Kim, P. E. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, C. J. Martoff, G. R. Mason, F. Mulhauser, A. Olin, C. Petitjean, T. A. Porcelli, J. Wozniak, and J. Zmeskal. Time-of-flight spectroscopy of muonic tritium. Hyperfine Interactions, 118(1-4):151-7, 1999. [International Symposium on Exotic Atoms, Molecules and Muon Catalyzed Fusion (EXAT 98). Ascona, Switzerland. 19-24 July 1998]. [ http ]
Emission of muonic tritium from a solid hydrogen layer has been studied via imaging of the muon-decay electrons and the time-of-flight distributions have been compared with detailed Monte Carlo calculations. Results are consistent at the 10% level with the theoretical prediction of a Ramsauer-Townsend minimum cross-section energy. (15 References).

[57] Rosso A. del, M. Augsburger, V. F. Boreiko, V. M. Bystritsky, M. Filipowicz, O. Huot, R. Jacot-Guillarmod, P. E. Knowles, F. Mulhauser, V. N. Pavlov, C. Petitjean, N. P. Popov, V. G. Sandukovsky, L. A. Schaller, H. Schneuwly, V. A. Stolupin, Y-A Thalmann, S. Tresch, and J. Wozniak. Measurement of the fusion rate in μ d 3He. Hyperfine Interactions, 118(1-4):177-82, 1999. [International Symposium on Exotic Atoms, Molecules and Muon Catalyzed Fusion (EXAT 98). Ascona, Switzerland. 19-24 July 1998]. [ http ]
Many atomic and molecular processes may occur after a muon has been stopped in a mixture of hydrogen and helium isotopes. In particular, the muonic molecule μd3He can be formed. This molecule either decays or undergoes muon catalyzed fusion. Theory predicts a fusion rate much lower than the decay rate; moreover, the various theoretical predictions differ from each other by several orders of magnitude. With the experiment presented here we intend to measure the effective fusion rate via the detection of the 14.7 MeV fusion proton. A new target and gas mixing system, designed at JINR, were used in a ten-day test run at PSI. The fusion protons and products from other transfer and background reactions were measured with several different detectors (plastic scintillators, BGO, germanium, neutron, and silicon detectors). The formation rate of the μd3He molecule and an upper limit for the effective fusion rate have been measured and are presented here. (10 References).

[58] A. Del Rosso, O. Huot, R. Jacot-Guillarmod, F. Mulhauser, L. A. Schaller, H. Schneuwly, Y.-A. Thalmann, S. Tresh, V. F. Boreiko, V. M. Bystritsky, S. V. Dovgun, A. N. Fedorov, V. N. Pavlov, F. M. Pen'kov, V. I. Sandukovsky, V. A. Stolupin, C. Petitjean, N. P. Popov, M. Filipowicz, and J. Wozniak. Measurements of fusion reaction in μd 3He molecules. PSI Annual Report 1997. Annex I, PSI Nucl. Part. Phys. Newsletter, page 29, 1998.
missing

[59] A. Del Rosso, M. Augsburger, O. Huot, P. Knowles, F. Mulhauser, L. A. Schaller, H. Schneuwly, V. F. Boreiko, V. M. Bystritsky, V. N. Pavlov, F. M. Pen'kov, V. I. Sandukovsky, V. A. Stolupin, C. Petitjean, N. P. Popov, W. Czaplinski, M. Filipowicz, and J. Wozniak. Proposal for a PSI experiment: Measuring the μd3He fusion. PSI Proposal, R-98-02, 1998. [unpublished].
The theoretical predictions for the nuclear fusion rates in μd3He molecules range over one order of magnitude, 105,6 s-1, depending on the type of calculation and the approximations used. At present an experimental upper limit (< 6·105 s-1) has been set for fusion from μd3He molecules. This value is certainly not sufficient to make a clear choice between the theoretical predictions. For μd4He molecules, no experimental data exist. We aim at determining the nuclear fusion rates for μd3He molecules by measuring the fusion products. The understanding of the kinetics and backgrounds will be used to judge the feasibility of a search for fusion in μd4He molecules

[60] V. S. Melezhik and J. Wozniak. Differential cross-sections of muonic atoms scattering. Asymmetric collisions: pμ +(d,t),dμ +(p,t) and tμ +(p,d). Hyperfine Interactions, 116(1-4):17-40, 1998. [ http ]
We present the differential cross-sections d&sigma (E,&Omega )/d&Omega for elastic and inelastic (isotopic exchange) scattering of muonic hydrogen, deuterium and tritium on hydrogen isotopes nuclei for the case of difference in masses of the projectile μ -atom and the target nucleus. Available partial phase shifts have been used in the calculations and the results are presented in tables and figures for different CMS collision energies. The cross-sections are important for description of the slowing down and diffusion of μ -atoms in matter and particularly for description of kinetics of muon catalyzed nuclear fusion. (12 References).

[61] V. M. Bystritsky, R. Jacot-Guillarmod, F. Mulhauser, and J. Wozniak. Experiment 742. Scattering of muonic hydrogen isotopes. In Triumf Annual Report. Scientific Activities 1997, pages 62-63. Triumf, Vancouver, Canada, 1998.
The Ramsauer-Townsend effect in elastic dμ and tμ scattering in hydrogen was experimentally studied with beams of muonic atoms at TRIUMF facility. In the report the details of E742 experiment and results of measurements are described.

[62] V.M. Bystritsky, R. Jacot-Guillarmod, F. Mulhauser, A. Adamczak, G.A. Beer, M. Filipowicz, M.C. Fujiwara, T.M. Huber, P. Kammel, S.K. Kim, P.E. Knowles, A.R. Kunselman, M. Maier, V.E. Markushin, G.M. Marshall, A. Olin, C. Petitjean, T.A. Porcelli, V.A. Stolupin, J. Wozniak, and J. Zmeskal. E742: Scattering of muonic hydrogen isotopes. TRIUMF-Annual Report 1996, page 52, 1997.
missing

[63] R. Jacot-Guillarmod, F. Mulhauser, L. A. Schaller, H. Schneuwly, S. Tresh, V. M. Bystritsky, V. B. Belyaev, V. G. Grebenyuk, V. I. Korobov, V. I. Sandukovsky, V. T. Sidorov, V. A. Stolupin, C. Petitjean, A. V. Kravtsov, A. I. Mikhailov, N. P. Popov, M. Filipowicz, and J. Wozniak. Measurements of nuclear fusion reactions in μd 3He and μd4He molecules. PSI Annual Report 1996. Annex I, PSI Nucl. Part. Phys. Newsletter, page 35, 1997.
The aim of this experiment is to measure the nuclear fusion rates in μd3He and μd4He molecules using muon beam at the μ E4 channel of PSI meson factory (Proposal R-96-01).

[64] V. M. Bystritsky, V. M. Grebenyuk, S. S. Parzhitski, F. M. Penkov, V. T. Sidorov, V. A. Stolupin, T. L. Bulgakov, G. A. Mesyats, A. A. Sinebryukhov, V. A. Sinebryukhov, S. A. Chaikovsky, A. V. Luchinsky, N. A. Ratakhin, S. A. Sorokin, V. M. Bystritskii, A. Toor, M. Filipowicz, A. Gula, E. Lacki, J. Wozniak, and E. Gula. A new approach in the experimental studies of nuclear reactions at ultralow energies. Nukleonika, 42(4):775-800, 1997.
A new experimental approach in the study of strong interactions between light nuclei at ultralow energies (100 eV-3 keV) is proposed. The method is based on the use of nanosecond ion beams generated by plasma linear accelerator. This approach will allow one to obtain information about characteristics of nuclear reactions in the indicated energy region. The use of classical accelerators is difficult because according to theoretical calculations the range of the cross section values for the studied reactions in this energy region is 10-43 - 10-32 cm2. In this paper, the method of measurement of the cross section is described and the first result of experiment on measurement of the (dd) reaction cross section at deuteron collision energies 220 eV is presented. (16 References).

[65] V. M. Bystritsky, R. Jacot-Guillarmod, F. Mulhauser, A. Adamczak, G. A. Beer, M. Filipowicz, M. C. Fujiwara, T. M. Huber, P. Kammel, S. K. Kim, P. Knowles, A. R. Kunselman, M. Maier, V. E. Markushin, G. M. Marshall, A. Olin, C. Petitjean, T. A. Porcelli, V. A. Stolupin, J. Wozniak, and J. Zmeskal. E742: Scattering of muonic hydrogen isotopes. In Triumf Annual Report. Scientific Activities 1996, page 35. Triumf, Vancouver, Canada, 1997.
missing

[66] T. L. Bulgakov, V. M. Bystritskii, V. M. Bystritsky, S. A. Chaikovsky, M. Filipowicz, V. M. Grebenyuk, A. Gula, A. V. Luchinsky, V. I. Makhrin, G. A. Mesyats, S. S. Parzhitski, N. A. Ratakhin, B. M. Sabirov, A. A. Sinebryukhov, V. A. Sinebryukhov, S. A. Sorokin, V. A. Stolupin, and J. Wozniak. Measurement of the cross section for the reaction d+d -> 3He+n at ultralow collision energies by the Z-pinch technique. Yadernaya Fizika, 60(8):1349-52, 1997. [ http ]
The cross section was measured for the reaction d+d -> 3He+n induced by incident deuterons with a mean energy of about 440 eV. The intense deuteron beam employed in this experiment was generated during the implosion of a liner. The experiment was performed at the high-current accelerator of the Institute of High-Current Electronics (Tomsk). The maximum current, voltage, and current-saturation time of the accelerator were 750 kA, 700 kV, and 60 ns, respectively. A two-jet gas liner involving 17% D2 acid 83% N2 was used (the inner jet served as a target). Neutrons emitted in deuteron-deuteron collisions were detected by scintillation spectrometers according to the time of flight and by BF3 thermal-neutron detectors encased in a polyethylene moderator. From a preliminary analysis of experimental data, it was found that the upper limit on the cross section for the reaction d+d -> 3He+n is 2*10-34 cm2 (at confidence level of 90%). (11 References).

[67] J. Wozniak, V. M. Bystritsky, R. Jacot-Guillarmod, and F. Mulhauser. Study of muonic hydrogen transport in TRIUMF experiment 742 by the Monte Carlo method. Hyperfine Interactions, 101-102:573-82, 1996. [International Symposium on Muon Catalyzed Fusion and the Physics of Exotic Atoms and Molecules ( mu CF-95). Dubna, Russia. Joint Inst. Nucl. Res. Russian Minist. Sci. & Tech. Policy. et al. 19-24 June 1995]. [ http ]
A technique of neutral muonic atom beams is proposed in the TRIUMF E742 experiment for measuring the scattering cross sections of muonic hydrogen isotopes in solid hydrogen. We present the results of Monte Carlo modeling of pμ and dμ atoms transport under the conditions of this experiment, taking into account the main physical as well as the geometrical aspects. The optimization of set-up parameters is performed in order to choose the most sensitive experimental conditions. (14 References).

[68] R. Jacot-Guillarmod, F. Mulhauser, L. A. Schaller, L. Schellenberg, H. Schneuwly, V. M. Bystritsky, V. B. Belyaev, V. G. Grebenyuk, V. I. Korobov, V. I. Sandukovsky, V. T. Sidorov, V. A. Stolupin, C. Petitjean, A. V. Kravtsov, N. P. Popov, M. Filipowicz, and J. Wozniak. Measurement of nuclear fusion reactions in μd3He and μd4He molecules. PSI Proposal, R-96-01, 1996.
missing

[69] R. Jacot-Guillarmod, J. M. Bailey, G. A. Beer, J. L. Beveridge, M. C. Fujiwara, T. M. Huber, P. Kammel, P. E. Knowles, A. R. Kunselman, G. M. Marshall, C. J. Martoff, G. R. Mason, F. Mulhauser, A. Olin, C. Petitjean, J. Wozniak, and J. Zmeskal. Muon molecular formation and transfer rate in solid hydrogen-deuterium mixtures. Hyperfine Interactions, 101-102:239-48, 1996. [International Symposium on Muon Catalyzed Fusion and the Physics of Exotic Atoms and Molecules ( mu CF-95). Dubna, Russia. Joint Inst. Nucl. Res. Russian Minist. Sci. & Tech. Policy. et al. 19-24 June 1995]. [ http ]
In an experiment at TRIUMF to study muon-catalyzed fusion and associated atomic and molecular effects, negative muons were stopped in a solid protium hydrogen layer containing a small amount of deuterium. Most of the resulting μ H atoms disappeared by formation of HHμ molecules or by muon transfer to a deuteron. The Dμ can drift almost freely through the hydrogen layer due to the Ramsauer-Townsend effect and may even leave the layer. If a thin neon layer is frozen atop the hydrogen, the exiting muonic atoms will very rapidly release their muon to a neon atom. The analysis of the time structure of the neon X-rays is used to determine the rates of the slower processes involved in the evolution of the Hμ . This analysis has been performed with the help of Monte Carlo calculations, which simulate the kinetics of both Hμ and Dμ atoms in the hydrogen mixtures. (23 References).

[70] R. Jacot-Guillarmod, A. Adamczak, G. A. Beer, V. M. Bystritsky, W. Czaplinski, M. Filipowicz, M. C. Fujiwara, T. M. Huber, P. Kammel, P. E. Knowles, A. R. Kunselman, V. E. Markushin, G. M. Marshall, F. Mulhauser, A. Olin, C. Petitjean, L. A. Rivkis, V. A. Stolupin, J. Wozniak, and J. Zmeskal. Investigation of muonic hydrogen isotopes scattering from H2 molecule. Hyperfine Interactions, 101-102:563-71, 1996. [International Symposium on Muon Catalyzed Fusion and the Physics of Exotic Atoms and Molecules ( mu CF-95). Dubna, Russia. Joint Inst. Nucl. Res. Russian Minist. Sci. & Tech. Policy. et al. 19-24 June 1995]. [ http ]
Knowledge of the cross sections for scattering of Hμ , Dμ and Tμ on molecules of hydrogen isotopes is necessary not only for checking the algorithmic solution of the Coulomb three-body problem but also for a general and correct description of the kinetics of muonic and molecular processes in mixtures of hydrogen isotopes. We plan to measure the scattering cross-section energy dependence of the reactions xμ +H2 -> xμ +H2 (x=d, t) in the energy collision range from 0.1 to 45 eV, using a multilayered target system recently developed at TRIUMF. (33 References).

[71] V. M. Bystritsky, R. Jacot-Guillarmod, F. Mulhauser, M. Maier, A. Adamczak, J. Wozniak, M. Filipowicz, V. A. Stolupin, A. R. Kunselman, C. Petitjean, T. M. Huber, V. E. Markushin, G. M. Marshall, A. Olin, P. Knowles, G. A. Beer, P. Kammel, S. K. Kim, M. C. Fujiwara, T. A. Porcelli, and J. Zmeskal. Scattering of muonic hydrogen isotopes. Experiment E742. Triumf Progress Report 1996, 1996. Vancouver, Canada [unpublished].
missing

[72] V. Bystritsky, W. Czaplinski, J. Wozniak, E. Gula, A. Kravtsov, A. Mikhailov, and N. Popov. Elastic scattering of excited muonic hydrogen. Physical Review A, 53(6):4169-75, 1996. [ http ]
Total elastic and transport cross sections for the (pμ )n*+p, (dμ )n*+d, and (tμ )n* +t systems (n is the principal quantum number) are calculated in the energy range 0.04 <= E <= 10 eV using the classical and quasiclassical approach. Electron screening is taken into account. The obtained elastic cross sections are large, especially for small E. The experimental methods of measuring these cross sections are discussed. (32 References).

[73] T. Bulgakov, Vit. Bystritskii, G. Mesyats, A. Sinebryukhov, V. Sinebryukhov, V. Bystritsky, V. Grebenyuk, S. Parzhitski, B. Sabirov, V. Stolupin, A. Luchinsky, S. Chaikovsky, V. Makhrin, N. Ratakhin, S. Sorokin, A. Gula, M. Filipowicz, and J. Wozniak. Nuclear reactions cross section measurement using Z-pinch technology. In Proc. 11-th Int. Conf. on High Power Particle Beams 'Beams'96', volume 2, page 917, 1996. [June 10-14, 1996, Prague, Czech Republic].
Direct experimental estimate of the upper limit of the d + d -> 3He + n cross section at deuteron energies below the keV region is obtained for the first time. The experiment was performed at the Pulsed Ion Beam Accelerator of the High-Current Electronics Institute in Tomsk, using high intensity, radially converging deuteron beams, generated during implosion of liner plasma. A two-jet liner made of 17%D2 + 83%N2 gas, was used, with the inner jet serving as a target. The dd-fusion neutrons were detected by time-of-flight scintillator spectrometers and BF3 detectors of thermal neutrons placed in polyethylene moderator. The upper limit obtained for the d+d -> 3He + n cross section for deuteron energy 440 eV is &sigma < 2·10-34 cm2 at 90% confidence level. The result demonstrates that liner implosion technique can be used in the investigations of nuclear reactions between light nuclei at infra low energies, previously not accessible in experiments with classical beam accelerators.

[74] A. Bertin, M. Bruschi, V. M. Bystritsky, M. Capponi, S. De Castro, B. Cereda, A. Ferretti, T. Florkowski, D. Galli, B. Giacobbe, V. V. Gushchin, U. Marconi, I. Massa, C. Moroni, M. Piccinini, M. Poly, L. A. Rivkis, V. I. Sakharov, N. Semprini-Cesari, R. Spighi, V. A. Stolupin, V. N. Tebus, S. Vecchi, A. Vezzani, M. Villa, A. Vitale, J. Wozniak, G. Zavattini, and A. Zoccoli. Negative result of an experiment aimed at verifying the hypothesis that cold and hot nuclear fusion occurs in Ti/(D-T) and ZrNbV/(D-T) systems. Physics of Atomic Nuclei, 59(5):744, 1996. [transl. from Yadernaya Fizika, 59, 5 (1996) 780-8]. [ http ]
The results of an experiment aimed at verifying the hypothesis that low-temperature nuclear fusion occurs in metal-hydrogen systems are presented. Titanium and an intermetallic compound ZrNbV saturated with a deuterium-tritium mixture are chosen for substances to be studied. Within experimental errors, no excess of neutron emission above the background level is observed for these substances saturated with a deuterium-tritium mixture. The hypothesis that hot nuclear dt fusion occurs in metal(D-T) systems is not confirmed in our experiment either. (14 References).

[75] A. Bertin, M. Bruschi, V. M. Bystritsky, Vit. M. Bystritskii, M. Capponi, S. De Castro, B. Cereda, V. D. Dugar-Zhabon, A. Ferretti, D. Galli, B. Giacobbe, V. I. Kirpal, A. I. Knyazev, I. M. Kravchenko, U. Marconi, I. Massa, S. I. Merzlyakov C. Moroni, M. Piccinini, M. Poly, L. A. Rivkis, N. V. Samsonenko, N. Semprini-Cesari, V. N. Shvetsov, V. T. Sidorov, V. N. Smirnov, S. I. Sorokin, R. Spighi, E. P. Starshin, V. A. Stolupin, A. V. Strelkov, S. Vecchi, A. Vezzani, M. Villa, A. Vitale, J. Wozniak, G. Zavattini, N. I. Zhuravlev, and A. Zoccoli. Negative result of an experiment aimed at verifying a report on cold nuclear fusion in systems of the NaxWO3/(D;D-T) type. Physics of Atomic Nuclei, 59(5):752, 1996. [transl. from Yadernaya Fizika, 59, 5 (1996) 789-94]. [ http ]
The results of an experiment aimed at verifying the conclusions drawn in the studies that were performed at the Institute of High-Temperature Electrochemistry (IHE, Yekaterinburg) and which report the observation of neutron emission due to low-temperature dd fusion in NaxWO3/deuterium systems are presented. Within statistical errors, the excess of the neutron yield above the background level is not observed in our experiment for the interaction of deuterium and deuterium-tritium mixture with oxide tungsten bronze. The hypothesis that hot dt fusion is possible in such systems is not confirmed either. The results of this study cast some doubt on the validity of the conclusions drawn in the IHE reports. At a 90% confidence level, an upper limit on the intensity In of a hypothetical neutron source associated with dd and dt fusion in the single crystals of oxide tungsten bronze is estimated to be 5*10- s-1. (12 References).

[76] A. Bertin, M. Bruschi, V. M. Bystritsky, M. Capponi, S. De Castro, B. Cereda, A. Ferretti, T. Florkowski, D. Galli, B. Giacobbe, V. V. Gushchin, U. Marconi, I. Massa, C. Moroni, M. Piccinini, M. Poly, L. A. Rivkis, V. I. Sakharov, N. Semprini-Cesari, R. Spighi, V. A. Stolupin, V. N. Tebus, S. Vecchi, A. Vezzani, M. Villa, A. Vitale, J. Wozniak, G. Zavattini, and A. Zoccoli. Absence of tritium yield in metal-deuterium systems. Physics of Atomic Nuclei, 59(6):934, 1996. [transl. from Yadernaya Fizika, 59, 6 (1996) 976-80]. [ http ]
Within errors of measurements, no tritium yield due to low-temperature nuclear dd fusion is observed in titanium of various modifications and in intermetallic compounds ZrNbV, LaCo/sub 5/, LaNi/sub 4.9/Al/sub 0.1/, and MM/sub 0.7/Ti0.3Mn2 saturated with deuterium. At a 90% confidence level, upper limits on the rate of dd fusion with tritium production in titanium and intermetallic compounds are found to be as follows: &lambda (Ti) ,=2* 10-23 s-1 and &lambda eff(Ti; intermet.) <= 6*10-24 s-1. (19 References).

[77] A. Adamczak, M. P. Faifman, L. I. Ponomarev, V. I. Korobov, V. S. Melezhik, R. T. Siegel, and J. Wozniak. Atlas of cross sections for scattering of muonic hydrogen atoms on hydrogen isotope molecules. Atomic Data & Nuclear Data Tables, 62(2):255-344, 1996. [ http ]
The total cross sections of the elastic, spin-flip, and charge-exchange processes for the scattering of muonic hydrogen isotope atoms (pμ , dμ , tμ ) in the ground state on hydrogen isotope molecules (H2, D2, T2, HD, HT, DT) are calculated. The scattering cross sections of muonic hydrogen isotope atoms on hydrogen isotope nuclei obtained earlier in the multichannel adiabatic approach are used in the calculations. Molecular effects (electron screening, rotational and vibrational excitations of target molecules, etc.) are taken into account. The spin effects of the target molecules and of the incident muonic atoms are included. The cross sections are averaged over the Boltzmann distribution of the molecule rotational states and the Maxwellian distribution of the target molecule kinetic energies for temperatures 30, 100, 300, and 1000 K. The cross sections are given for kinetic energies of the incident muonic atoms ranging from 0.001 to 100 eV in the laboratory frame. (45 References).

[78] A. Bertin, M. Bruschi, V. M. Bystritsky, M. Capponi, B. Cereda, Castro S. De, A. Ferretti, D. Galli, B. Giacobbe, U. Marconi, I. Massa, C. Moroni, M. Piccinini, M. Poli, N. Semprini-Cesari, R. Spighi, S. Vecchi, A. Vezzani, M. Villa, V. Vitale, J. Wozniak, G. Zavattini, and A. Zoccali. A Monte Carlo study of the neutron registration efficiency of a multichannel NE213 detection system. Nukleonika, 40(2):101-11, 1995. [International Workshop on Exotic Muonic Complexes: Experiment, Theory. Cracow, Poland. Committee of Sci. Res. 27 Sept.-5 Oct. 1993].
The Monte Carlo calculations of the registration efficiency of a four-channel NE213 detector for 2.5 MeV neutrons are reported. The dependence of the efficiency on registration threshold as well as the influence of different substances placed between the neutron source and the scintillators on the efficiency value are also shown. (9 References).

[79] V. B. Belyaev, A. Bertin, V. M. Bystritsky, V. M. Bystritsky, A. Gula, O. I. Kartavtsev, A. V. Kravtsov, A. V. Luchinsky, G. A. Mesyats, L. A. Rivkis, N. A. Rotakhin, A. A. Sinebryukhov, S. I. Sorokin, S. G. Stetsenko, V. A. Stolupin, A. Vitale, and J. Wozniak. New proposals for the investigation of strong interaction of light nuclei at super low energies. Nukleonika, 40(2):85-99, 1995. [International Workshop on Exotic Muonic Complexes: Experiment, Theory. Cracow, Poland. Committee of Sci. Res. 27 Sept.-5 Oct. 1993].
Two projects of the experimental study of nuclear reactions between light nuclei (p, d, t, He, Li, Be) in the region of very low energies are presented. The first proposal deals with nuclear fusion reactions in charge-nonsymmetric muonic molecular complexes such as 3,4He-d-μ , 3,4He-t-μ, 6,7Li-p-μ, 6,7Li-d-μ, 6,7Li-t-μ. In the second one we consider a new approach to the measurement of nuclear reaction cross sections of light nuclei (p, d, t) in the range of 0.01 - 2 keV, using high intensity radially converging ion flow generated during linear implosion in plasma with the use of high power pulsed generator. The choice of experimental conditions has been made and lower limits of the measured values (fusion rates and cross sections) have been estimated. (23 References).

[80] V. B. Belyaev, Vyach. M. Bystritsky, V. M. Grebenyuk, O. I. Kartavtsev, S. S. Parzhitsky, B. M. Sabirov, V. T. Sidorov, S. G. Stetsenko, V. A. Stolupin, T. L. Bulgakov, G. A. Mesyats, A. A. Sinebryukhov, Vit. M. Bystritsky, W. Czaplinski, M. Filipowicz, A. Gula, E. Lacki, J. Wozniak, F. E. Zyazula, S. K. Anrukhovich, A. V. Luchinsky, N. A. Ratakhin, S. A. Sorokin, and S. A. Chaikovskii. Investigation of interaction between light nuclei at superlow energies 100 - 2000 eV (project LESI). JINR Communications, D15-95-378, 1995.
The aim of this project is the measurement of the cross sections of pd, dd, and d3He-reactions in the range of the collision energies from 100 to 2000 eV making use of nanosecond ion beams obtained with the aid of liner plasma. Implementation of the experiments foreseen by this project will make possible a first determination of the characteristics of the investigated reactions in the region of ultralow energies indicated. This problem cannot be resolved, practically, with the aid of classical accelerators, since theoretical estimations show the cross sections of the reactions investigated to be within the range from 10-43 to 10-32 cm2 for the energies indicated. The products of the nuclear reactions, i.e. γ-quanta, charged particles and neutrons, are to be detected by detectors based on NaI(Tl) crystals, by CR-39 solid-state detectors, and by plastic scintillation detectors involving TOF technique, respectively. The experimental program can be implemented at the high-current accelerators SNOP-111 and GIT-8 at the RAS IHCE (Tomsk, Russia).

[81] V. M. Bystritsky, R. Jacot-Guillarmod, F. Mulhauser, J. Wozniak, V. A. Stolupin, W. Czaplinski, M. Filipowicz, A. Adamczak, A. R. Kunselman, C. Petitjean, T. M. Huber, L. A. Rivkis, V. E. Markushin, G. M. Marshall, A. Olin, , P. Knowles, G. A. Beer, P. Kammel, M. C. Fujiwara, and J. Zmeskal. Scattering of muonic hydrogen isotopes. Experiment E742. Triumf Proposal, 1994. Vancouver, Canada [unpublished].
missing

[82] A. Bertin, M. Bruschi, V. M. Bystritsky, M. Capponi, B. Cereda, I. D'Antone, S. De Castro, D. Galli, B. Giacobbe, U. Marconi, I. Massa, C. Moroni, M. Piccinini, M. Poly, N. Semprini-Cesari, R. Spighi, V. A. Stolupin, S. Vecchi, A. Vezzani, M. Villa, A. Vitale, J. Wozniak, G. Zavattini, and A. Zoccoli. Performance of a coincidence neutron spectrometer with double pulse-shape discrimination. Nuclear Instruments and Methods in Physics Research Section A-Accelerators Spectrometers Detectors & Associated Equipment, 337(2-3):445-460, 1994. [ http ]
We describe here the performance of a new coincidence spectrometer which allows the detection of neutrons in the MeV energy range, by exploiting a two-stage pulse-amplitude analysis

[83] V. S. Melezhik and J. Wozniak. Differential cross sections of muonic atom scattering. I. Muon Catalyzed Fusion, 7(3):203-30, 1992.
Calculation of differential cross sections d&sigma /d&Omega for elastic and inelastic scattering of hydrogen, deuterium and tritium μ -atoms on p, d and t nuclei for CMS collision energies 0.5 < E < 50 eV are reported. Available partial phase shifts have been used in these calculations. The cross sections obtained may be used for the description of transport processes of μ -atoms in matter and particularly for the description of the kinetics of muon catalyzed nuclear fusion. (8 References).

[84] C. Chiccoli, V. I. Korobov, V. S. Melezhik, P. Pasini, L. I. Ponomarev, and J. Wozniak. The atlas of the cross sections of mesic atomic processes. III. The processes pμ +(d,t), dμ +(p,t) and tμ +(p,d). Muon Catalyzed Fusion, 7(1-2):87-153, 1992.
For pt.II see Adamczak et al., ibid., vol.4, p.303 (1989). The mesic atomic cross sections for elastic scattering (aμ + b -> aμ + b) and isotopic exchange processes (aμ + b -> bμ + a) in asymmetric collisions of pμ , dμ and tμ atoms with bare p, d and t nuclei are presented. They have been calculated in the collision energy range 0.001 < E < 50 eV using the multichannel adiabatic representation for the Coulomb three-body problem. The results are given in tables and figures. (27 References).

[85] A. Bertin, M. Bruschi, D. Bulgarelli, V. M. Bystritsky, M. Capponi, I. D'Antone, Castro S. De, D. Galli, U. Marconi, I. Massa, C. Moroni, M. Piccinini, M. Poli, N. Semprini-Cesari, R. Spighi, V. A. Stolupin, S. Vecchi, M. Villa, A. Vitale, J. Wozniak, G. Zavattini, and A. Zoccoli. Neutron spectrometry by means of a two-stage neutron-gamma pulse-shape discriminating apparatus. Nuovo Cimento A, 105A(5):751-6, 1992.
The authors report on the results obtained by a novel coincidence neutron spectrometer while detecting time-of-flight selected neutrons in the MeV energy range. (5 References).

[86] V. B. Belyaev, A. Bertin, Vit. M. Bystritsky, Vyach. M. Bystritsky, A. Gula, O. I. Kartavtsev, A. V. Kravtsov, A. V. Luchinsky, G. A. Mesyats, L. I. Rivkis, N. A. Ratakhin, A. A. Sinebryukhov, S. A. Sorokin, S. G. Stetsenko, V. A. Stolupin, A. Vitale, and J. Wozniak. Investigations of strong interactions at very low energies (50 ev - 1000 eV). JINR Communications, D15-92-324, 1992.
To study nuclear reactions d+d->t+p, p+6Li->7Be+γ, d+3He->p+4He, etc. at very low energies (50 eV - 1000 eV) by means of liner plasma the experimental programme is proposed. The products of nuclear reactions are proposed to be registered with polymeric track detectors on the basis of CR-39, NaI(Tl) scintillation detectors, etc. The lower limit of cross sections estimated for dd-reaction is σ= 10-38 cm2. The investigations are proposed to be carried out in the High Current Electronics Institute (Tomsk, Russia).

[87] V. B. Belyaev, A. Bertin, V. M. Bystritsky, A. Gula, O. I. Kartavtsev, A. Kravtsov, L. A. Rivkis, S. I. Sorokin, S. G. Stetsenko, V. A. Stolupin, A. Vitale, and J. Wozniak. Investigation of nuclear fusion reactions in charge-nonsymmetric muonic molecules. JINR Communication D15-92-323, 1992.
The project presents an experimental programme on the study of fusion of light nuclei (H, He, Li, Be) in charge-nonsymmetric muonic molecules HeHμ, LiHμ, BeHμ (H is p, d, t). The project describes techniques, conditions of experiments on the study of nuclear fusion reactions in muonic molecules 3,4HeHμ, 6,7LiHμ. There are also limiting estimations of nuclear fusion rates, which can be obtained in the experiments. For this experimental programme the intensive muon beams are required.

[88] A. Adamczak, C. Chiccoli, V. I. Korobov, V. S. Melezhik, P. Pasini, L. I. Ponomarev, and J. Wozniak. Muon transfer rates in hydrogen isotope mesic atom collisions. Physics Letters B, 285(4):319-24, 1992. [ http ]
The results of multi-level adiabatic calculations for the muon transfer rates in mesic atom ground states are presented for all hydrogen isotopes. The influence of the molecular structure and electron shell of hydrogen molecules on the processes has been taken into consideration. A comparison with previous theoretical data and experiments is reported. (26 References).

[89] L. Bracci, C. Chiccoli, G. Fiorentini, V. S. Melezhik, P. Pasini, L. I. Ponomarev, and J. Wozniak. Recent progress in the theoretical description of the mesic atomic collision processes pμ + p, dμ + d and tμ + t. Muon Catalyzed Fusion, 5(1-4):21-31, 1990. [International Conference on Muon Catalyzed Fusion mu CF `90. Vienna, Austria. 27 May-1 June 1990].
The results of previous theoretical investigations of the mesic atomic collision processes pμ + p, dμ + d and tμ + t are presented. The cross sections of these processes are obtained for energies from 0.005 eV up to tens of eV, where elastic scattering and spin-flip may occur. The calculations have been performed in the adiabatic representation of the three-body problem. The adiabatic expansion was so truncated that 52 components of the discrete spectrum and several hundred components of the continuous spectrum of the adiabatic basis were used. The mesic atomic cross sections on `bare` nuclei and corresponding phase shifts have been used as the input data for estimating the role of electron screening and molecular effects in the slowing down process of mesic atoms in the mixture where catalysis takes place. Applications of the obtained results to interpret the experimental data are discussed. (30 References).

[90] L. Bracci, C. Chiccoli, G. Fiorentini, V. S. Melezhik P. Pasini, and J. Wozniak. Collisions of muonic atoms. In L. M. Simons, D. Horváth, and G. Torelli, editors, Electromagnetic Cascade and Chemistry of Exotic Atoms, pages 253-67, New York, USA, 1990. Plenum Press. [Proceedings of the Fifth Course of the International School of Physics of Exotic Atoms, held in Erice, Italy].
The three-body problem is classical in both classical and quantum mechanics. In this latter framework, several approaches have been developped (variational calculations, Fadeev method, adiabatic representation for instance). In this work we focus our attention to the very special case where dominated force is the Coulomb interaction, and the continuous spectrum is investigated.

[91] L. Bracci, C. Chiccoli, G. Fiorentini, V. S. Melezhik, P. Pasini, and J. Wozniak. Calculation of the elastic scattering cross sections for pμ + p and tμ + t collisions in adiabatic representation. Physics Letters A, 149(9):463-8, 1990. [ http ]
The authors present results for elastic scattering of pμ and tμ mesic atoms in ortho and para states on hydrogen and tritium corresponding to nuclei in the energy range interesting for muon catalyzed fusion experiments. The calculations are performed in the framework of the adiabatic representation of the three-body problem, with several hundreds of basis wave functions taken into account. (15 References).

[92] L. Bracci, C. Chiccoli, P. Pasini, G. Fiorentini, V. S. Melezhik, and J. Wozniak. About the boundary conditions for the three-body scattering problem in the adiabatic representation. Nuovo Cimento B-General Physics Relativity Astronomy, Mathematical Physics and Methods, 105 B(4):459-86, 1990.
The authors investigate the asymptotic behaviour of the wave function of a three-particle Coulomb system (a, b, c; M/sub a/[right angle bracket]or=M/sub b/[right angle bracket]m/sub c/) in the adiabatic representation. They evaluate the effect of the basis truncation on its asymptotic dependence on the slow variable R (the coordinate of relative motion of nuclei a and b) in the region of break-up of the three-body system into subsystems (ac)/sub 1s/+b and a+(bc)/sub 1s/. A procedure for taking into account the truncation of the basis is presented, which is shown to converge in the case of the scattering problem. (9 References).

[93] L. Bracci, C. Chiccoli, P. Pasini, G. Fiorentini, V. S. Melezhik, and J. Wozniak. Collision-induced spin flip in isotopes of muonic hydrogen. Physics Letters A, 134(7):435-9, 1989.
The authors present results for spin flip processes in muonic atoms. The calculations are performed in the framework of the adiabatic representation of the three-body Coulomb problem. The contribution of back decay is taken into account and comparison with available experimental data is reported. (13 References).

[94] L. Bracci, C. Chiccoli, G. Fiorentini, V. S. Melezhik, P. Pasini, L. I. Ponomarev, and J. Wozniak. The atlas of the cross sections of mesic atomic processes. I. the processes pμ + p, dμ + d and tμ +t. Muon Catalyzed Fusion, 4(4):247-302, 1989.
The elastic and inelastic cross sections for the processes p mu +p, d mu +d and t mu +t are calculated in a collision energy range 0.005[left angle bracket]or=E[left angle bracket]or=50 eV. In the calculations the adiabatic representation method for the Coulomb three-body problem was used. The results are given in tables and figures. (17 References).

[95] J. Banas, M. Ciechanowski, M. Duli/nski, A. Kreft, J. Molenda, K. Morstin, A. Stok/losa, and J. Wozniak. Geophysical aspects of cold nuclear fusion in condensed matter. Nuclear Geophysics, 3(4):321-2, 1989.
[96] V. N. Bystritsky, J. Wozniak, V. G. Granovski, V. P. Dzhelepov, A. P. Zakharov, V. G. Zinov, I. Kanaiev, E. Lacki, Y. P. Melnik, V. A. Stolupin, and V. A. Sharapov. Penetration of hydrogen isotopes through the superalloy EI698 at high pressures and temperatures. Atomic Energy, 65(6):966-972, 1988. [english translation from Atomnaya Energia, vol. 65, No. 6, pp. 395-9, 1988]. [ http ]
We determined the parameters of the processes of penetration and diffusion of the hydrogen isotopes through the superalloy EI698 the 600 - 1050 K in the range at pressures up to 100 MPa. It was shown that the penetrating flux is in proportional to the pressure square root in the 0.1 - 100 MPa pressure range. The diffusion coefficient of hydrogen (deuterium) does not depend on the concentration of the dissolved hydrogen (deuterium) that attains a value of 1.3·106 cm3/(cm3Me) at a pressure of 100 MPa and a temperature of 1050 K. The concentration of the dissolved hydrogen is not critical with respect to hydrogen-embrittlement of the EI698 alloy subjected to loading for a period of 600 h under an internal pressure of 100 MPa. Based on the obtained values of the penetration rates of hydrogen and deuterium through the EI698 alloy, the decrease in the quantity of the gas in the vessel can be taken into account properly when carrying out experimental studies on the processes of mu-catalysis.

[97] V. N. Bystritsky, J. Wozniak, V. G. Granovski, V. P. Dzhelepov, A. P. Zakharov, V. G. Zinov, I. Kanaiev, V. A. Kuc, E. Lacki, Y. P. Melnik, V. A. Stolupin, and V. A. Sharapov. Penetration of hydrogen and deuterium through a double (bimetal) Au+EI698 alloy jacket at high temperatures and pressures. Atomic Energy, 65(6):1004-6, 1988. [english translation from Atomnaya Energia, Vol. 65, No. 6, pp. 422-4, 1988]. [ http ]

[98] L. Bracci, C. Chiccoli, P. Pasini, G. Fiorentini, V. S. Melezhik, and J. Wozniak. Spin flip rates in collisions between muonic atoms. In American Institute of Physics Conference Proceedings, volume 181, pages 214-16, 1988. [Muon-Catalyzed Fusion 1988 Meeting. Sanibel Island, FL, USA. 1-6 May 1988].
The authors present the calculation of spin flip rates for a wide range of temperatures in the case of (d mu )-d, (p mu )-p and (t mu )-t collisions. The calculations have been performed in the framework of the adiabatic representation of the three-body problem. (11 References).

[99] L. Bracci, C. Chiccoli, G. Fiorentini, P. Pasini, V. S. Melezhik, and J. Wozniak. Collisions between isotopes of muonic hydrogen. In L. Bracci, P. Christillin, A. Fabrocini, et al., editors, Perspectives on Theoretical Nuclear Physics, pages 29-33, Pisa, Italy, 1988. ETS EDITRICE PISA. [Proc. 2nd Seminar on Perspectives on Theoretical Nuclear Physics, Cortona, October 5 - 7, 1987].
[100] V. S. Melezhik and J. Wozniak. Cross sections for scattering of mesic atoms on hydrogen isotope nuclei. In H. Narumi and I. Shimamura, editors, Proc. of the 10th Intern. Conf. on Atomic Physics, ICAP-X, page 106. North-Holland, Amsterdam, Netherlands, 1987. [10th Intern. Conf. on Atomic Physics, August 25 - 29, 1986, Tokyo].
Cross sections for mesic atomic processes have been calculated: elastic scattering of dμ and tμ mesic atoms on nuclei, isotope exchange and spin-flip, at different CMS collision energies.[5 

[101] L. Bracci, J. Wozniak, C. Chiccoli, G. Fiorentini, P. Pasini, and V. S. Melezhik. Collisions between muonic isotopes of hydrogen and hydrogen isotopes. In Proc. LXXIII Congresso Nazionale di Societa Italiana di Fisica, pages 149-150, Napoli, Italy, 1987. [Proc. LXXIII Congresso Nazionale di Societa Italiana di Fisica, Napoli, October 12 - 17, 1987].
[102] L. Bracci, C. Chiccoli, G. Fiorentini, P. Pasini, V. S. Melezhik, and J. Wozniak. Collisions between hydrogen isotopes and their muonic counterparts. In Proc. Int. Symp. on Muon and Pion Interactions with Matter, pages 295-301. JINR, Dubna, 1987. [Proc. Int. Symp. on Muon and Pion Interactions with Matter, Dubna, June 30 - July 4, 1987].
[103] V. S. Melezhik and J. Wozniak. Cross sections for scattering of deuterium mesic atoms on deuterium nuclei. Physics Letters A, 116(8):370-4, 1986.
Cross sections have been calculated for elastic scattering of deuterium mesic atoms in ortho and para states on deuterium nuclei in the 0-50 eV energy range; cross sections for spin-flip have also been calculated. The calculations have been performed in the adiabatic representation where the initial problem of slow collisions in a three-body system is reduced to the multichannel scattering problem. The temperature dependence of the ortho-para transition rate lambda /sub hf/(T) for d mu atoms is obtained for a deuterium target. The calculated rate 37.2*10/sup 6/ s/sup -1/ (at 30K) is in good agreement with the recent experimental value, lambda /sub exp/(30K)=(37.0+or-0.74)*10/sup 6/ s/sup -1/ (Vienna-SIN group, 1983). (11 References).

[104] V. M. Bystritsky and J. Wozniak. Use of a large-volume NE-213 scintillator for investigations of the ttμ->4He + 2n + μ- reaction. Acta Physica Polonica B, 17:309-312, 1986.
Use of a large-volume NE-213 scintillator for investigations of the mechanism of the nuclear synthesis reaction ttμ -> 4He + 2n + μ is discussed. The investigations are supposed to be performed by comparison of the measured amplitude distributions of registered neutrons with the calculated neutron distributions obtained for an assumed form of the matrix element of the reaction.

[105] E. Chrusciel, W. Jagusztyn, J. Gyurcsak, A. Kreft, A. Lenda, w. Przybylowicz, and J. Wozniak. Sposob okreslania popielnosci w weglach brunatnych w stanie roboczym, 1985. Patent PRL No. 131178

.

[106] V.M. Bystritsky, J. Wozniak, A. Gula, V.P. Dzhelepov, V.G. Zinov, E. Lacki, V.A. Stolupin, and S.G. Shamstudinov. Liquid tritium target with temperature variation in the range 20.6 t T t 40K. Pribory & Tekhnika Eksperimenta, 1:46-47, 1985. [in russian].
Construction of the liquid tritium target with temperature variation in the range 20.6 t T t 40K is described. The target is designated for the investigations of μ -atom and μ -molecular processes in liquid tritium. Test measurements show the temperature stability of +-0.2 K during the long (300 - 400 h) experimental runs.

[107] V. M. Bystritsky, J. Wozniak, and VG. Zinov. Characteristics of large volume NE213 neutron counters for muon catalyzed fusion investigations. Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors & Associated Equipment, A241(2-3):532-8, 1985.
The Monte Carlo method is used to establish the properties and feasibility of a large volume NE213 scintillator as an efficient neutron detector. The recoil proton spectra, calculated efficiencies for different detection thresholds and scintillator sizes are presented for neutron energies up to 15 MeV. The time characteristics, e.g. time resolution, are discussed. It is also shown that no strong influence of light attenuation by the scintillator itself on the calculated efficiencies is observed when the gamma-calibration technique is used. A detector volume of approximately 100 1 is suggested for application in investigations of mu -atom and mu -molecular processes. (20 References).

[108] V. S. Melezhik, L. I. Ponomarev, and J. Wozniak. Scattering cross sections of muonic hydrogen atoms on hydrogen isotope nuclei. In F. Guttner, B. Povh, and G. zu Putlitz, editors, Proceedings of the 10th Int. Conf. on Particles and Nuclei (PANIC). Book of Abstracts, volume II, page L40. Univ. of Heidelberg Press, 1984. [10th Int. Conf. on Particles and Nuclei (PANIC), July 30 - August 3, 1984, Heidelberg].
[109] V. S. Melezhik, L. I. Ponomarev, and J. Wozniak. Scattering cross sections of muonic hydrogen atoms as applied to the muon catalysis. In Contributions to the Muon-Catalyzed Fusion Workshop, page 18. EG&G Idaho. Idaho Falls, ID, USA, 1984. [Jackson Hole, WY, USA. 7-8 June 1984].
Summary form only given. Cross sections of the mesic atoms p mu , d mu and t mu in the ground state scattered on the nuclei of hydrogen isotopes p, d and t are calculated in the scattering energy range 10/sup -3/-2 eV. The cross sections of elastic scattering, isotope exchange and spin-flip processes are considered and their energy dependence is evaluated. The adiabatic representation in the three-body problem is used in which the problem is reduced to solving the multichannel scattering problem. The algorithm provides an accuracy [left angle bracket]or approximately=5%, which is sufficient for describing the kinetics of muon catalyzed fusion. (3 References).

[110] A. Kreft, E. Chrusciel, B. Dziunikowski, J. Gyurcsak, S. Kalita, A. Lenda, W. Przybylowicz, and J. Wozniak. Integrated instrumental analysis of soft brown coals. Fuel, 63:1281, 1984.
A method for the simultaneous determination of calorific value Qr, ash yield Ar and total water content Wrt of soft brown coals is described. The method involves instrumental analysis of brown coal samples using neutron thermalization and gamma back-scattering techniques. Over 80 coal samples (1.1 kg) were analysed, having Qr values up to 15.5 MJ/kg, Ar ranging from 3.6 to 76.1 wt% and Wrt ranging from 11.4 to 61.7 wt%. A comparison of the results from the instrumental method with those of standard laboratory analyses is given, followed by a discussion of the accuracy of the method and of possible ways of improvong it.

[111] E. Chrusciel, G. Etgens, J. Franczyk, J. Gyurcsak, R. Krasowski, A. Kreft, and J. Wozniak. Urzadzenie do pomiaru zawartosci wodoru i zwiazkow wodorowych, 1984. Patent PRL No. 122980.
missing

[112] V. N. Bystritsky, V. P. Dzhelepov, A. Gula, V. P. Kapyshev, A. D. Konin, M. D. Malek, SSh Mukhamet-Galeeva, E. Lacki, L. A. Rivkis, V. A. Stolupin, S. G. Shamsutdinov, V. A. Utkin, J. Wozniak, and VG. Zinov. Liquid tritium target with variation of temperature for the investigation of muon-catalyzed fusion: t+t ->4He+2n. In Contributions to the Muon-Catalyzed Fusion Workshop, page 20. EG&G Idaho. Idaho Falls, ID, USA, 1984. [Jackson Hole, WY, USA. 7-8 June 1984].
Summary form only given. The design of the liquid tritium target for the experimental investigation of the muon-catalysed nuclear fusion t+t to /sup 4/He+2n is described. The temperature of liquid tritium in the target can be varied between 20.6 and 40K. Tritium cooling and temperature stabilization are secured by liquid or gaseous hydrogen at varying pressures which itself is cooled by liquid hydrogen at atmospheric pressure. The system of target filling and tritium removal is also presented. The activity of tritium for which the system is designed is 8.5*10/sup 4/ Ci. (3 References).

[113] V. N. Bystritsky, J. Wozniak, A. Gula, V. P. Dzhelepov, V. P. Kapyshev, M. D. Malek, S. S. Mukhamet-Galeeva, L. A. Rivkis, V. A. Stolupin, V. A. Utkin, and S. G. Shamsutdinov. Gas filling system of the liquid tritium target with 35 cc active volume. Pribory & Tekhnika Eksperimenta, 4:46-49, 1984. [in russian].
The system of target filling and tritium removal is presented. The activity of tritium for which the system is designed is 8.5*104 Ci.

[114] V. M. Bystritsky, V. P. Dzhelepov, A. Gula, V. A. Stolupin, and J. Wozniak. Determination of optimal conditions for the experimental investigation of muon catalysis of nuclear reaction: t+t ->4He+2n. Acta Physica Polonica B, B15(7):699-713, 1984.
Formulae describing the kinetics of muon-catalysed fusion t+t to /sup 4/He+2n in pure tritium are analysed with the aim of establishing optimum conditions for the experimental investigation of tt mu -fusion. It is shown that to determine the parameters characterizing tt mu -fusion in an experiment with a pure tritium target data have to be taken at different target densities. The range of variation of target density required to cover the region of parameter values predicted theoretically is determined. In particular, it is shown that temperature variation of the density of liquid tritium in a rather small range above the temperature of liquid hydrogen (20.4K) is sufficient in this kind of experiment. (13 References).

[115] V. M. Bystritsky, V. P. Dzhelepov, A. Gula, J. Wozniak, and VG. Zinov. Calculation of neutron registration efficiency for experimental investigation of ttμ->4He+2n+μ- and dtμ-> 4He+n+μ- muon-catalysed fusion reactions. Acta Physica Polonica B, B15(7):689-97, 1984.
Neutron registration efficiency in experiments on muon-catalysed fusion reaction tt mu to /sup 4/He+2n+ mu /sup -/ and dt mu to 4He+n+ mu - is calculated. The dependence of light output response of the detectors on energy threshold of the registration apparatus is obtained. For fusion reaction in the tt mu molecule the values of registration efficiency are determined for several types of final-state interaction between the reaction products. (18 References).

[116] V. M. Bystritsky, A. Gula, and J. Wozniak. Cycle-by-cycle analysis of muon-catalysed fusion in a one-component medium. Atomkernenergie Kerntechnik, 45(3):197-9, 1984.
The formulae describing the separate cycles of muon catalysed nuclear synthesis of hydrogen isotopes in a one-component medium (pure deuterium or tritium) are derived and discussed. (9 References).

[117] M. Bubak, V. M. Bystritsky, A. Gula, and J. Wozniak. Kinetics of muon catalyzed nuclear synthesis in media containing one hydrogen isotope and heavier element admixtures. In Contributions to the Muon-Catalyzed Fusion Workshop, page 19. EG&G Idaho. Idaho Falls, ID, USA, 1984. [Jackson Hole, WY, USA. 7-8 June 1984].
Summary form only given. Kinetic formulae are derived describing the evolution in time of the processes leading to the muon-catalyzed nuclear synthesis in pure D/sub 2/ or T/sub 2/ targets containing possible admixtures of heavier elements. The formulae enable one to take into account any mu -molecular and mu -atomic processes in the muon-catalysis chain, and describe the time distributions of these processes in separate cycles with inclusion of the experimental detection efficiency. (2 References).

[118] E. Chrusciel, W. Jagusztyn, A. Kreft, A. Lenda, W. Przyby/lowicz, and J. Wozniak. Determination of the ash yield and the mineral matter content of brown coals by density measurements. Fuel, 62:389, 1983.
missing

[119] E. Chrusciel, B. Dziunikowski, J. Gyurcsak, S. Kalita, A. Kreft, A. Lenda, W. Przybylowicz, and J. Wozniak. Determination of the asphalt content in bituminous mixtures by neutron thermalisation. Technical Report INT 168/I, Institute of Nuclear Techniques AGH, Cracow, 1982.
missing

[120] E. Chrusciel, J. Gyurcsak, R. Krasowski, A. Kreft, and J. Wozniak. Determination of the asphalt content in bituminous mixtures by neutron thermalisation. In Proc. of EPS Conf. Nuclear Physics Methods in Material Research, page 312, 1980. [EPS Conf. Nuclear Physics Methods in Material Research, Darmstad, August 23 -26, 1980].
missing

[121] K. Morstin and J. Wozniak. Hydrogen in coal. Feasibility of determination by neutron methods. In Nuclear Techniques and Mineral Resources 1977, pages 119-133. IAEA, Vienna, 1977.
An increasing interest in coal problems, such as processing, underground gasification, and combating the methane danger, leeds to the need for techniques to determine rapidly the hydrogen content in coal seams. Neutron methods seem to be particularly useful for this purpose. In order to test their usefulness, neutron parameters of coal versus its hydrogea content were calculated. Next, the stationary neutron fields were considered using some different theoretical approaches. Strong dependences are observed, thus confirming the feasibility of the proposed determinations, especially with applying the epithermal-neutron gauges, since the appreciable matrix effects can be expected in the case of thermal neutron detection. The interferring influence of the borehole was considered using the experimentally verified theoretical approach.

[122] J. Wozniak. Solution of the neutron transport equation in P1 multigroup approach for empty borehole geometry and its application for neutron method of soil moisture measurements. PhD thesis, University of Mining and Metallurgy, Cracow, 1975. [in polish].
missing

[123] J. Gyurcsak, R. Krasowski, A. Kreft, and J. Wozniak. Dual-detector gauges for soil density and moisture measurements. Technical Report INT 97/I, Institute of Nuclear Techniques AGH, Cracow, 1975. [Sympozjum Naukowe: Postepy Techniki Izotopowej w Nauce i Gospodarce Narodowej, Zakopane, 1975, p.9, (in polish)].
missing

[124] J. Wozniak. Etalonnage des sondes neutron-neutron pour humidimetre et pour daiagraphie de porosite. Technical Report SES/PUB/SAI/73-205, CEN Saclay, Saclay, 1973.
missing

[125] J. Wozniak. Calibration of neutron gauges for measuring of the soil moisture content in the 4π geometry. Technical Report INT 27/I, Institute of Nuclear Techniques AGH, Cracow, 1973.
missing

[126] J. Wozniak. Solution of the neutron diffusion equation in an infinitive medium with a cylindrical hole. Nukleonika, 17(9):433, 1972.
missing

[127] J. Wozniak. Determining the thickness of fissures in rocks during radioisotope inspection of borehole cementation. Nukleonika, 17(9):467, 1972.
The natural gamma-logging theory serves as a basis for a technique for determining the thickness of fissures in rocks during the radioisotope control of the borehole cementation. Radioactive cement is injected into the borehole and penetrates the fissures. The gamma-logging is performed after the cement stopper has been removed by another drilling. The thickness of the particular fissures can be found from the registered intensity of gamma-rays.

[128] J. Moscicki and J. Wozniak. Measuring of soil density in the range 0.6 - 1.4 g/cm3 using gamma-gamma method. Technical Report INT 28/I, Institute of Nuclear Techniques AGH, Cracow, 1972.
The report presents the possbility of employing the gamma-gamma method for measuring the soil density in the interval 0.6 - 1.4 g/cm2 (peats, silts), that is in the range of densities where, for the most of gamma-gamma probes, the maximum of the calibration curve is observed and for this reason a simple single-counter probe cannot be used. It has been shown that using a two-counter probe withe the two counters placed in such a way that for the one nearer to the isotope source the slope of the calibration curve is positive and for that fahrter off - negative, a good sensitivity of measurement can be achieved.

[129] J. A. Czubek, J. Studnicki, and J. Wozniak. Dwudetektorowa sonda do pomiaru gestosci gruntow i skal, 1972. Patent PRL No. 66119.
[130] A. Kreft and J. Wozniak. Laboratory investigations on applicability of 3He filled proportion counters for moisture measurements. In Proceedings of II Seminar on Soil Mechanics and Foundation Engineering, 1970. [II Seminar on Soil Mechanics and Foundation Engineering, Lodz, 1970].
Tha aim of this work was the investigation of the applicability of 3He-filled neutron counters for the moisture measurements. The results of performed systematic comparison between 3He counters and the most widely used in moisture gauges BF3 counters are presented.


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