Generalized folding model for elastic and inelastic nucleus-nucleus scattering using realistic density dependent nucleon-nucleon interaction

A generalized double-folding model for elastic and inelastic nucleus-nucleu s scattering is presented. It is designed to accommodate effective nucleon- nucleon (NN) interactions that depend upon the density of nuclear matter in which the two nucleons are immersed. A recently parametrized density depen dent M3Y interaction, based on the G-matrix elements of the Pails NN potent ial, has been used in the present folding calculation. The effects of knock -on exchange of the interacting nucleon pair are included in an accurate lo cal approximation, Examples of the application of this model to study the r efractive elastic and inelastic scattering data of C-12 + C-12 and alpha Ni-58.60 systems are presented. A detailed comparison of the use of deforme d optical potential (DP) and microscopic folded potential in the analysis o f inelastic scattering has shown that the use of DP fails to reproduce the inelastic C-12 + 12C scattering das measured over a wide angular range, whi ch covers both the diffractive and refractive regions. The use of the DP mo del also significantly underestimates the nuclear deformation lengths of th e quadrupole and octupole excitations under study. (C) 2000 Elsevier Scienc e B.V. All rights reserved.