Excitation energy dependence of symmetry energy of finite nuclei

TL;DR

This paper investigates how the symmetry energy of finite nuclei varies with excitation energy, using a finite range effective interaction and comparing results with experimental data from nuclear collisions.

Contribution

It introduces a method to evaluate the excitation energy dependence of symmetry energy in finite nuclei considering thermal and expansion effects.

Findings

Results align well with experimental data from nucleus-nucleus collisions.

The study demonstrates the impact of excitation energy on symmetry energy.

The approach accounts for thermal and expansion effects in finite nuclei.

Abstract

A finite range density and momentum dependent effective interaction is used to calculate the density and temperature dependence of the symmetry energy coefficient Csym(rho,T) of infinite nuclear matter. This symmetry energy is then used in the local density approximation to evaluate the excitation energy dependence of the symmetry energy coefficient of finite nuclei in a microcanonical formulation that accounts for thermal and expansion effects. The results are in good harmony with the recently reported experimental data from energetic nucleus-nucleus collisions.