An improved single particle potential for transport model simulations of nuclear reactions induced by rare isotope beams

TL;DR

This paper develops an improved single particle potential by refining the isospin dependence in the Gogny effective interaction, enhancing the accuracy of nuclear reaction simulations involving rare isotope beams.

Contribution

It introduces new expressions for the single nucleon potential and symmetry energy that account for spin, isospin, and density effects more precisely.

Findings

Both spin(isospin) and density dependence significantly influence symmetry potential and energy.

The improved potential enhances the accuracy of transport model simulations.

Effects are especially notable at supra-saturation densities.

Abstract

Taking into account more accurately the isospin dependence of nucleon-nucleon interactions in the in-medium many-body force term of the Gogny effective interaction, new expressions for the single nucleon potential and the symmetry energy are derived. Effects of both the spin(isospin) and the density dependence of nuclear effective interactions on the symmetry potential and the symmetry energy are examined. It is shown that they both play a crucial role in determining the symmetry potential and the symmetry energy at supra-saturation densities. The improved single nucleon potential will be useful for simulating more accurately nuclear reactions induced by rare isotope beams within transport models.