Folding model analysis of 6,7Li elastic scattering at 12.5-53 MeV/u

Li-6,Li-7-nucleus double-folding optical potentials have been constructed using the JLM, and a gaussian shape of the effective nucleon-nucleon interaction. Angular distributions of the differential cross sections of Li-6,Li-7 elastic scattering from C-12, Si-28, Ca-40, Ni-58, Zr-90, and Pb-208 targets at 12.5-53 MeV/u were analyzed using the derived potentials. An energy-dependent reducing renormalization coefficient was required for the real component of the JLM optical potential in order to obtain successful predictions of the observed cross sections even when the projectile density-dependence was considered. A similar behavior was found for calculations based on the density-independent gaussian version of the effective nucleon-nucleon interaction. However, no renormalization was needed when a density-dependence approximation was involved. The energy and target mass number-dependence in the renormalization factor, real volume integrals and total reaction cross sections are investigated. (C) 2002 Elsevier Science B.V. All rights reserved.