Rearrangement in folding potentials with density-dependent nucleon-nucleon interaction

摘要

We discuss optical potentials for the nuclear elastic scattering from avariational viewpoint. Density-dependence in the effective $N$-$N$ interaction leads to densityrearrangement terms, in addition to the conventional folding term. Effects of the rearrangement on the $N$-$A$ optical potential are illustratedin the nuclear-matter limit. Closely relating to consistency with the saturation, the rearrangementappreciably improves the isoscalar optical potential depth over the previousfolding model calculations. The rearrangement gives stronger effects as the density grows. We also present rearrangement terms in the $A$-$A$ double-folding potential. Since the rearrangement terms are relevant to the nuclear structure butshould be handled within the reaction model, $N$-$N$ effective interactions applicable both to structure models and to thefolding model will be desired for unambiguous description of the nuclearelastic scattering.