Search

Your search keyword '"Bochkarev, O. V."' showing total 36 results
Start Over Author "Bochkarev, O. V."
36 results on '"Bochkarev, O. V."'

1. Critical Temperature for the Nuclear Liquid-Gas Phase Transition

Author

Karnaukhov, V. A., Oeschler, H., Avdeyev, S. P., Duginova, E. V., Rodionov, V. K., Budzanowski, A., Karcz, W., Bochkarev, O. V., Kuzmin, E. A., Chulkov, L. V., Norbeck, E., and Botvina, A. S.

Subjects
Nuclear Experiment
Abstract

The charge distribution of the intermediate mass fragments produced in p (8.1 GeV) + Au collisions is analyzed in the framework of the statistical multifragmentation model with the critical temperature for the nuclear liquid-gas phase transition $T_c$ as a free parameter. It is found that $T_c=20\pm3$ MeV (90% CL)., Comment: 4 pages, 3 figures, published in Phys. Rev. C

Published
2003
Full Text
View/download PDF

2. Comparative Study of Multifragmentation of Gold Nuclei Induced by Relativistic Protons, $^4$He, and $^{12}$C

Author

Avdeyev, S. P., Karnaukhov, V. A., Petrov, L. A., Rodionov, V. K., Rukoyatkin, P. A., Toneev, V. D., Oeschler, H., Bochkarev, O. V., Chulkov, L. V., Kuzmin, E. A., Budzanovski, A., Karcz, W., Janicki, M., Norbeck, E., Botvina, A. S., and Gudima, K. K.

Subjects
Nuclear Experiment
Abstract

Multiple emission of intermediate-mass fragments has been studied for the collisions of p, $^4$He and $^{12}$C on Au with the $4\pi$ setup FASA. The mean IMF multiplicities (for the events with at least one IMF) are saturating at the value of $2.2\pm0.2$ for the incident energies above 6 GeV. The observed IMF multiplicities cannot be described in a two-stage scenario, a fast cascade followed by a statistical multifragmentation. Agreement with the measured IMF multiplicities is obtained by introducing an intermediate phase and modifying empirically the excitation energies and masses of the remnants. The angular distributions and energy spectra from the p-induced collisions are in agreement with the scenario of ``thermal'' multifragmentation of a hot and diluted target spectator. In the case of $^{12}$C+Au(22.4 GeV) and $^4$He(14.6 GeV)+Au collisions, deviations from a pure thermal break-up are seen in the energy spectra of the emitted fragments, which are harder than those both from model calculations and from the measured ones for p-induced collisions. This difference is attributed to a collective flow., Comment: 33 pages 15 figures, accepted in Nucl. Phys. A

Published
2002
Full Text
View/download PDF

3. Transition from Thermal to Rapid Expansion in Multifragmentation of Gold Induced by Light Relativistic Projectiles

Author

Avdeyev, S. P., Karnaukhov, V. A., Petrov, L. A., Rodionov, V. K., Toneev, V. D., Oeschler, H., Bochkarev, O. V., Chulkov, L. V., Kuzmin, E. A., Budzanowski, A., Karcz, W., Janicki, M., Norbeck, E., and Botvina, A. S.

Subjects
Nuclear Experiment
Abstract

Multiple emission of intermediate-mass fragments has been studied for the collisions of p, $^4$He and $^{12}$C on Au with the $4\pi$ setup FASA. In the case of $^{12}$C(22.4 GeV)+Au and $^4$He(14.6 GeV)+Au collisions, the deviations from a pure thermal break-up are seen in the energy spectra of the emitted fragments: the spectra are harder than calculated and than measured in p-induced collisions. This difference is attributed to a collective flow with the expansion velocity on the surface about 0.1 $c$ (for $^{12}$C+Au collisions)., Comment: 12 pages, 3 figures, accepted in Phys. Lett. B

Published
2001
Full Text
View/download PDF

5. Investigation of nuclear matter distribution of the neutron-rich He isotopes by proton elastic scattering at intermediate energies

Author

Kiselev, O. A., Aksouh, F., Bleile, A., Bochkarev, O. V., Chulkov, L. V., Cortina-Gil, D., Dobrovolsky, A. V., Egelhof, P., Geissel, H., Hellström, M., Isaev, N. B., Komkov, B. G., Mátos, M., Moroz, F. V., Münzenberg, G., Mutterer, M., Mylnikov, V. A., Neumaier, S. R., Pribora, V. N., Seliverstov, D. M., Sergueev, L. O., Shrivastava, A., Sümmerer, K., Weick, H., Winkler, M., Yatsoura, V. I., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
Full Text
View/download PDF

7. Study of Nuclear Matter Distributions of Halo Nuclei 6He and 8He with Elastic Proton Scattering

Author

Aksouh, F., Bleile, A., Bochkarev, O. V., Chulkov, L. V., Cortina-Gil, D., Dobrovolsky, A. V., Egelhof, P., Geissel, H., Hellström, M., Isaev, N. B., Kiselev, O. A., Komkov, B. G., Mátos, M., Moroz, F. V., Münzenberg, G., Mutterer, M., Mylnikov, V. A., Neumaier, S. R., Pribora, V. N., Seliverstov, D. M., Sergueev, L. O., Shrivastava, A., Sümmerer, K., Weick, H., Winkler, M., Yatsoura, V. I., Plessas, W., editor, Krivec, Rajmund, editor, Rosina, Mitja, editor, Golli, Bojan, editor, and Širca, Simon, editor

Published
2003
Full Text
View/download PDF

9. Study of Nuclear Matter Distributions of Halo Nuclei 6He and 8He with Elastic Proton Scattering

Author

Aksouh, F., primary, Bleile, A., additional, Bochkarev, O. V., additional, Chulkov, L. V., additional, Cortina-Gil, D., additional, Dobrovolsky, A. V., additional, Egelhof, P., additional, Geissel, H., additional, Hellström, M., additional, Isaev, N. B., additional, Kiselev, O. A., additional, Komkov, B. G., additional, Mátos, M., additional, Moroz, F. V., additional, Münzenberg, G., additional, Mutterer, M., additional, Mylnikov, V. A., additional, Neumaier, S. R., additional, Pribora, V. N., additional, Seliverstov, D. M., additional, Sergueev, L. O., additional, Shrivastava, A., additional, Sümmerer, K., additional, Weick, H., additional, Winkler, M., additional, and Yatsoura, V. I., additional

Published
2003
Full Text
View/download PDF

10. Elastic proton scattering from neutron-rich He-isotopes at intermediate energies and high momentum transfer

Author

Kisselev, O. A., primary, Aksouh, F., additional, Bleile, A., additional, Bochkarev, O. V., additional, Chulkov, L. V., additional, Cortina-Gil, D., additional, Dobrovolsky, A. V., additional, Egelhof, P., additional, Geissel, H., additional, Hellström, M., additional, Isaev, N. B., additional, Komkov, B. G., additional, Mátos, M., additional, Moroz, F. V., additional, Münzenberg, G., additional, Mutterer, M., additional, Mylnikov, V. A., additional, Neumaier, S. F., additional, Pribora, V. N., additional, Seliverstov, D. M., additional, Sergueev, L. O., additional, Shrivastava, A., additional, Sümmerer, K., additional, Weick, H., additional, Winkler, M., additional, and Yatsoura, V. I., additional

Published
2003
Full Text
View/download PDF

11. Investigation of nuclear matter distribution of the neutron-rich He isotopes by proton elastic scattering at intermediate energies

Author

Kiselev, O. A., primary, Aksouh, F., additional, Bleile, A., additional, Bochkarev, O. V., additional, Chulkov, L. V., additional, Cortina-Gil, D., additional, Dobrovolsky, A. V., additional, Egelhof, P., additional, Geissel, H., additional, Hellström, M., additional, Isaev, N. B., additional, Komkov, B. G., additional, Mátos, M., additional, Moroz, F. V., additional, Münzenberg, G., additional, Mutterer, M., additional, Mylnikov, V. A., additional, Neumaier, S. R., additional, Pribora, V. N., additional, Seliverstov, D. M., additional, Sergueev, L. O., additional, Shrivastava, A., additional, Sümmerer, K., additional, Weick, H., additional, Winkler, M., additional, and Yatsoura, V. I., additional

Full Text
View/download PDF

14. Evidence for a neutron skin in $^{20}N$

Author

Bochkarev, O V, Chulkov, L V, Egelhof, P, Geissel, H, Golovkov, M S, Irnich, H, Janas, Z, Keller, H, Kobayashi, T, Kraus, G, Münzenberg, G, Nickel, F, Ogloblin, A A, Ozawa, A, Piechaczek, A, Roeckl, E, Schwab, W, Sümmerer, K, Suzuki, T, Tanihata, I, and Yoshida, K

Subjects
Nuclear Physics
Published
1997

16. Decay of hot nuclei produced by relativistic light ions

Author

Karnaukhov, V A, Avdeev, S P, Kuznetsov, W D, Petrov, L A, Rodionov, V K, Shmakov, S Yu, Uzhinskii, V V, Zubkevich, A S, Oeschler, H, Lips, V, Bochkarev, O V, Chulkov, L V, Kuzmin, E A, Yankov, G B, Budzanowski, A, Karcz, W, and Norbeck, E

Subjects
Nuclear Physics
Published
1995

17. Interaction cross-sections and matter radii of A = 20 isobars

Author

Chulkov, L V, Kraus, G, Bochkarev, O V, Egelhof, P, Geissel, H, Golovkov, M S, Irnich, H, Janas, Z, Keller, H, Kobayashi, T, Münzenberg, G, Nickel, F, Ogloblin, A A, Ozawa, A, Patra, S K, Piechaczek, A, Roeckl, E, Schwab, W, Sümmerer, K, Suzuki, T, Tanihata, I, and Yoshida, K

Subjects
Nuclear Physics
Published
1995

21. Investigation of nuclear matter distribution of the neutron-rich He isotopes by proton elastic scattering at intermediate energies

Author

Kiselev, O. A., primary, Aksouh, F., additional, Bleile, A., additional, Bochkarev, O. V., additional, Chulkov, L. V., additional, Cortina-Gil, D., additional, Dobrovolsky, A. V., additional, Egelhof, P., additional, Geissel, H., additional, Hellström, M., additional, Isaev, N. B., additional, Komkov, B. G., additional, Mátos, M., additional, Moroz, F. V., additional, Münzenberg, G., additional, Mutterer, M., additional, Mylnikov, V. A., additional, Neumaier, S. R., additional, Pribora, V. N., additional, Seliverstov, D. M., additional, Sergueev, L. O., additional, Shrivastava, A., additional, Sümmerer, K., additional, Weick, H., additional, Winkler, M., additional, and Yatsoura, V. I., additional

Published
2005
Full Text
View/download PDF

22. Critical temperature for the nuclear liquid-gas phase transition

Author

Karnaukhov, V. A., primary, Oeschler, H., additional, Avdeyev, S. P., additional, Duginova, E. V., additional, Rodionov, V. K., additional, Budzanowski, A., additional, Karcz, W., additional, Bochkarev, O. V., additional, Kuzmin, E. A., additional, Chulkov, L. V., additional, Norbeck, E., additional, and Botvina, A. S., additional

Published
2003
Full Text
View/download PDF

23. DEVELOPMENT OF DECISION MAKING ALGORITHM FOR CONTROL OF SEA CARGO CONTAINERS BY "TAGGED" NEUTRON METHOD.

Author

Anan'ev, A. A., Belichenko, S. G., Bogolyubov, E. P., Bochkarev, O. V., Petrov, E. V., Polishchuk, A. M., and Udaltsov, A. Yu.

Subjects
CARGO handling, NEUTRONS, GAMMA-ray scattering, RADIATION shielding, RADIOACTIVITY safety measures, SECURITY systems
Abstract

Nowadays in Russia and abroad there are several groups of scientists, engaged in development of systems based on "tagged" neutron method (API method) and intended for detection of dangerous materials, including high explosives (HE). Particular attention is paid to possibility of detection of dangerous objects inside a sea cargo container. Energy gamma-spectrum, registered from object under inspection is used for determination of oxygen/carbon and nitrogen/carbon chemical ratios, according to which dangerous object is distinguished from not dangerous one. Material of filled container, however, gives rise to additional effects of rescattering and moderation of 14 MeV primary neutrons of generator, attenuation of secondary gamma-radiation from reactions of inelastic neutron scattering on objects under inspection. These effects lead to distortion of energy gamma-response from examined object and therefore prevent correct recognition of chemical ratios. These difficulties are taken into account in analytical method, presented in the paper. Method has been validated against experimental data, obtained by the system for HE detection in sea cargo, based on API method and developed in VNIIA. Influence of shielding materials on results of HE detection and identification is considered. Wood and iron were used as shielding materials. Results of method application for analysis of experimental data on HE simulator measurement (tetryl, trotyl, hexogen) are presented. [ABSTRACT FROM AUTHOR]

Published
2009

24. L=1Excitation in the Halo Nucleus11Li

Author

Korsheninnikov, A. A., primary, Kuzmin, E. A., additional, Nikolskii, E. Yu., additional, Bochkarev, O. V., additional, Fukuda, S., additional, Goncharov, S. A., additional, Ito, S., additional, Kobayashi, T., additional, Momota, S., additional, Novatskii, B. G., additional, Ogloblin, A. A., additional, Ozawa, A., additional, Pribora, V., additional, Tanihata, I., additional, and Yoshida, K., additional

Published
1997
Full Text
View/download PDF

25. MULTIFRAGMENTATION INDUCED BY RELATIVISTIC α-PROJECTILES

Author

LIPS, V., primary, BARTH, R., additional, OESCHLER, H., additional, AVDEYEV, S. P., additional, KARNAUKHOV, V. A., additional, KUZNETSOV, W. D., additional, PETROV, L. A., additional, BOCHKAREV, O. V., additional, CHULKOV, L. V., additional, KUZMIN, E. A., additional, KARCZ, W., additional, NEUBERT, W., additional, and NORBECK, E., additional

Published
1995
Full Text
View/download PDF

26. Multifragmentation induced by relativistic α projectiles

Author

Lips, V., primary, Barth, R., additional, Oeschler, H., additional, Avdeyev, S. P., additional, Karnaukhov, V. A., additional, Kuznetsov, W. D., additional, Petrov, L. A., additional, Bochkarev, O. V., additional, Chulkov, L. V., additional, Kuzmin, E. A., additional, Karcz, W., additional, Neubert, W., additional, and Norbeck, E., additional

Published
1994
Full Text
View/download PDF

29. Charge-changing cross sections of relativistic light nuclei

Author

Bochkarev, O. V., Winkler, M., Geissel, H., Summerer, K., Ivanov, M., Yoshida, K., Kimura, K., Kobayashi, T., Cortina, D., Korcheninnikov, A. A., Munzenberg, G., Niciel, F., Ogloblin, A. A., Ozawa, A., Pribora, V. N., Marek Pfutzner, Rozhkov, M. V., Simon, H., Sitar, B., Strmen, P., Susuki, T., Tanihata, I., Chulkov, L. V., Hellstrom, M., and Janik, P.

30. Investigation of nuclear matter distribution of the neutron-rich He isotopes by proton elastic scattering at intermediate energies.

Author

Gross, Carl J., Nazarewicz, Witold, Rykaczewski, Krzysztof P., Kiselev, O. A., Aksouh, F., Bleile, A., Bochkarev, O. V., Chulkov, L. V., Cortina-Gil, D., Dobrovolsky, A. V., Egelhof, P., Geissel, H., Hellström, M., Isaev, N. B., Komkov, B. G., Mátos, M., Moroz, F. V., Münzenberg, G., Mutterer, M., and Mylnikov, V. A.

Abstract

Absolute differential cross-sections for elastic p6He and p8He scattering were measured in inverse kinematics with secondary beams. In order to supplement data taken for small-angle scattering, differential cross-sections for higher momentum transfer were measured using liquid hydrogen target. Both data sets were analyzed together. They have permitted to deduce the radial shape of the nuclear matter distributions and the root-mean-square radii with the help of Glauber theory. In addition to a phenomenological analysis, used already in the previous work, a model-independent analysis with a help of a Sum-Of-Gaussians (SOG) method has been performed. The experimental p6;8He elastic scattering cross-sections have also been compared with the predictions from various theoretical nuclear models. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

33. Quasi-free scattering with 6,8He beams.

Author

Chulkov, L. V., Aksouh, F., Bleile, A., Bochkarev, O. V., Cortina-Gil, D., Dobrovolsky, A. V., Egelhof, P., Geissel, H., Hellström, M., Isaev, N. B., Kiselev, O. A., Komkov, B. G., Matoš, M., Moroz, F. N., Münzenberg, G., Mutterer, M., Mylnikov, V. A., Neumaier, S. R., Pribora, V. N., and Seliverstov, D. M.

Subjects
*PARTICLES (Nuclear physics), *NUCLEAR physics, *ANNIHILATION reactions, *ANYONS
Abstract

This paper presents the results of experimental investigations of (p,pn), (p,pα) and (p,p 6He) reactions with relativistic 6He and 8He beams impinging on a hydrogen target. Information on the structure of extremely neutron-rich nuclei was obtained by using the unique characteristic of quasi-free scattering processes and inverse kinematics. For the first time, momentum distributions of complex clusters inside 6He and 8He were measured. Spectroscopic factors for valence neutrons, α- and 6He clusters were deduced from the experimental data. They demonstrate that the filling of the p½ shell is the essential feature of the 8He structure. It is shown that the 8He cluster structure can be considered as a 6He core plus two valence neutrons. [Copyright &y& Elsevier]

Published
2005
Full Text
View/download PDF

34. Time scale of the thermal multifragmentation in p+Au collisions at 8.1 GeV.

Author

Rodionov, V. K., Avdeyev, S. P., Karnaukhov, V. A., Petrov, L. A., Kirakosyan, V. V., Rukoyatkin, P. A., Oeschler, H., Budzanowski, A., Karcz, W., Janicki, M., Bochkarev, O. V., Kuzmin, E. A., Chulkov, L. V., Norbeck, E., and Botvina, A. S.

Subjects
*COLLISIONS (Nuclear physics), *FRAGMENTATION reactions
Abstract

The relative angle correlation of intermediate mass fragments has been studied for p+Au collisions at 8.1 GeV. Strong suppression at the small angles is observed caused by IMF–IMF Coulomb repulsion. Experimental correlation function is compared to that obtained by the multibody Coulomb trajectory calculations with the various decay times τ of fragmenting system. The combined model, including the empirically modified intranuclear cascade followed by statistical multifragmentation, was used to generate starting conditions for these calculations. The model dependence of the results obtained has been carefully checked. The mean decay time of fragmenting system is found to be τ⩽70 fm/c. [Copyright &y& Elsevier]

Published
2002
Full Text
View/download PDF

35. Application of neutron generators for high explosives, toxic agents and fissile material detection.

Author

Aleksandrov VD, Bogolubov EP, Bochkarev OV, Korytko LA, Nazarov VI, Polkanov YG, Ryzhkov VI, and Khasaev TO

Subjects
Explosions prevention & control, Neutron Activation Analysis instrumentation, Nuclear Fission, Radioisotopes analysis, Chemical Terrorism prevention & control, Hazardous Substances analysis, Neutron Activation Analysis methods
Abstract

The portable pulsed neutron generators developed and designed by VNIIA are presented. The neutron methods are good tools for non-destructive assay of dangerous materials. The samples of various systems for the detection of high explosives in luggage, identification of toxic agents in chemical munitions, and also for the prevention of illicit trafficking of fissile elements in passengers' luggage are discussed.

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results