Электронный каталог

Статья

Lukyanov, S.M.
Empirical Formulas for Fragmentation Production Cross Section / S.M.Lukyanov, V.A.Maslov, D.Aznabayev, T.Issatayev, K.Mendibayev, A.Shahov. – Text : electronic // Advances in Nuclear Science and Applications. – 2025. – Vol. 1, No. 4. – P. 269-284. – URL: https://doi.org/10.63907/ansa.v1i4.63. – Bibliogr.: 25.

Production cross sections of neutron-rich nuclei in projectile fragmentation reactions measured at zero degrees are systematically analyzed using published experimental data. By comparing the yields of O, F, Ne, Na, Mg, Al, Si, and P isotopes produced in &sup(40)Ar-induced fragmentation at beam energies of 35~MeV/nucleon, 57--120~MeV/nucleon, and 1~GeV/nucleon, we demonstrate that the production cross sections of neutron-rich fragments are, within experimental uncertainties, essentially independent of the projectile energy over this broad range. Motivated by this limiting-fragmentation behavior, we propose an empirical systematics for neutron-rich fragment production based on the binding energy per nucleon (BE/A) of the final nuclei. The cross sections are found to follow a steep exponential dependence on , spanning 8--9 orders of magnitude for small variations of BE/A . The systematics is tested for reactions induced by &sup(40)Ar, &sup(48)Ca, &sup(58,64,68)Ni, &sup(72)Zn, &sup(76)Ge, &sup(82)Se, and &sup(86)Kr projectiles on Be and Ta targets, and the corresponding fit parameters are shown to correlate with the fragment charge Z and the projectile neutron-to-proton ratio (N/Z)&sub(projectile) . Additionally, a complementary analysis based on Q&sub(gg) systematics (mass difference between projectile and detected fragments) is also presented, and the advantages and limitations of the BE/A -based description for extrapolating yields toward the neutron drip line are discussed.



Спец.(статьи,препринты) = С 343 а - Теория ядерных реакций. Различные модели: статистическая, оптическая, резонансная
ОИЯИ = ОИЯИ (JINR)2025