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.

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