Non-equilibrium processes in p
Аннотация: The double differential spectra ${d}^{2}\ensuremath{\sigma}/d\mathrm{\ensuremath{\Omega}}dE$ of $p$, $d$, $t$, $^{3,4,6}\mathrm{He}$, $^{6,7,8,9}\mathrm{Li}$, $^{7,9,10}\mathrm{Be}$, and $^{10,11,12}\mathrm{B}$ were measured at seven scattering angles, ${15.6}^{\ensuremath{\circ}}$, ${20}^{\ensuremath{\circ}}$, ${35}^{\ensuremath{\circ}}$, ${50}^{\ensuremath{\circ}}$, ${65}^{\ensuremath{\circ}}$, ${80}^{\ensuremath{\circ}}$, and ${100}^{\ensuremath{\circ}}$, in the laboratory system for proton induced reactions on a silver target. Measurements were done for three proton energies: 1.2, 1.9, and 2.5 GeV. The experimental data were compared to calculations performed by means of two-step theoretical microscopic models. The first step of the reaction was described by the intranuclear cascade model incl4.6 and the second one by four different models (ABLA07, GEM2, gemini++, and SMM) using their standard parameter settings. Systematic deviations of the data from predictions of the models were observed. The deviations were especially large for the forward scattering angles and for the kinetic energy of emitted particles in the range from about 50 to 150 MeV. This suggests that some important non-equilibrium mechanism is lacking in the present day microscopic models of proton-nucleus collisions in the studied beam energy range.
Год издания: 2017
Авторы: M. Fidelus, D. Filges, F. Goldenbaum, L. Jarczyk, B. Kamys, M. Kistryn, St. Kistryn, E. Kozik, P. Kulessa, H. Machner, A. Magiera, B. Piskor-Ignatowicz, K. Pysz, Z. Rudy, S. Sharma, R. Siudak, M. Wojciechowski
Издательство: American Physical Society
Источник: Physical review. C
Ключевые слова: Nuclear physics research studies, Atomic and Molecular Physics
Другие ссылки: Physical review. C (HTML)
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Том: 96
Выпуск: 6