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The existing and some preliminary experimental data on the total crosssections of the $^{4,6}$He, $^{6,7}$Li +$^{28}$Si reactions at energies E=5-50A MeV are demonstrated. The data on $^{6}$Li,$^{6}$He+$^{28}$Si are analyzed inthe framework of the microscopic optical potential with real and imaginaryparts obtained with a help of the double-folding procedure and by using thecurrent models of densities of the projectile nuclei. Besides, the microscopicdouble-folding Coulomb potential is calculated and its effect on cross sectionsis compared with that when one applies the traditional Coulomb potential of theuniform charge distribution. The semi-microscopic potentials are constructedfrom both the renormalized microscopic potentials and their derivatives to takeinto account collective motion effect and to improve an agreement withexperimental data.Comment: 8 pages; 7 figures; submitted to Proceedings of the International  Symposium on Exotic Nuclei "EXON-2006" (Khanty-Mansiysk, Russia, 17-22 July  2006

Microscopic model analysis of the 6He, 6Li+28Si total reaction cross sections at the energy range 5–50 A MeV