REALISTIC SCENARIO FOR THE QUASI-ELASTIC SCATTERING OF LI-11,C-11-12 AT E(C)A-SIMILAR-OR-EQUAL-TO-60 MEV/

The elastic Li-11, C-11+C-12 scattering at E/A similar or equal to 60 MeV has been studied using a semimicroscopic version of the optical mo del. The real optical potential was calculated within the double-foldi ng model using a realistic nucleon-nucleon effective interaction and a more accurate treatment of the knock-on exchange. A Hartree-Fock dens ity was taken for Li-11, while the shell model was used for C-11,C-12. The imaginary potential was taken in standard Woods-Saxon form, The d ynamic polarization potential due to the breakup effect, based on the results of realistic four-body calculations of the Li-11+C-12 scatteri ng, has been added to both the real and imaginary potentials for Li-11 . From different assumptions about the absorptive strength at the surf ace region, we found a set of parameters which give a reasonable descr iption of the quasielastic Li-11,C-11+C-12 scattering data at E/A simi lar or equal to 60 MeV as well as reproducing the observed trend for t he total reaction cross section at higher energies.