Microscopic Model Analysis of the ${}^6$He,${}^6$Li+${}^{28}$Si Total Reaction Cross Sections at the Energy Range 5-50 a Mev

Abstract

The existing and some preliminary experimental data on the total cross sections of the ${}^{4,6}$He, ${}^{6,7}$Li +${}^{28}$Si reactions at energies E=5-50 A MeV are demonstrated. The data on ${}^6$Li,${}^6$He+${}^{28}$Si are analyzed in the framework of the microscopic optical potential with real and imaginary parts obtained with a help of the double-folding procedure and by using the current models of densities of the projectile nuclei. Besides, the microscopic double-folding Coulomb potential is calculated and its effect on cross sections is compared with that when one applies the traditional Coulomb potential of the uniform charge distribution. The semi-microscopic potentials are constructed from both the renormalized microscopic potentials and their derivatives to take into account collective motion effect and to improve an agreement with experimental data.

arXiv comment8 pages; 7 figures; submitted to Proceedings of the International Symposium on Exotic Nuclei "EXON-2006" (Khanty-Mansiysk, Russia, 17-22 July 2006)