Accurate nuclear symmetry energy at finite temperature within a Brueckner-Hartree-Fock approach

Fan Li (李凡), Jia-Jing Lu (陆家靖), Zeng-Hua Li (李增花), Chong-Yang Chen (陈重阳), G. F. Burgio, and H.-J. Schulze

Phys. Rev. C 103, 024307 – Published 5 February 2021

Abstract

We compute the free energy of asymmetric nuclear matter in a Brueckner-Hartree-Fock approach at finite temperature, paying particular attention to the dependence on isospin asymmetry. The first- and second-order symmetry energies are determined as functions of density and temperature and useful parametrizations are provided. We find small deviations from the quadratic isospin-asymmetry dependence and very small corresponding effects on (proto)neutron star structure.

Received 21 April 2020
Revised 5 December 2020
Accepted 19 January 2021

DOI:https://doi.org/10.1103/PhysRevC.103.024307

Physics Subject Headings (PhySH)

Asymmetric nuclear matter Equations of state of nuclear matter Nuclear astrophysics Nuclear forces Symmetry energy

Nuclear Physics

Authors & Affiliations

Fan Li (李凡), Jia-Jing Lu (陆家靖), Zeng-Hua Li (李增花)^*, and Chong-Yang Chen (陈重阳)

Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, People's Republic of China

G. F. Burgio and H.-J. Schulze

INFN Sezione di Catania, Dipartimento di Fisica, Universitá di Catania, Via Santa Sofia 64, 95123 Catania, Italy

^*zhli09@fudan.edu.cn

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Vol. 103, Iss. 2 — February 2021

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Physical Review C

covering nuclear physics