Local density approximation in effective density-dependent?N-interactions

Abstract

Different forms of a local density approximation (LDA) in effective density-dependent c~N-interactions are compared in single-folding optical model analyses of elastic particle scattering by 40, ~2, r at E~= 104 MeV and by ~~ at E~= 140 MeV. It is shown that the form of the LDA considerably influences the results on folded optical potentials. A variable form of the LDA is suggested and discussed which includes previous forms as limiting cases. The new form leads to better fits to the data and to full consistency with the best available "model-independent" optical potentials.