Isospin and temperature dependence of the rearrangement term in Brueckner theory

Abstract

In the framework of Brueckner theory, the mass operator is evaluated up to second order in the hole-line expansion and the single-particle potentials of neutrons and protons are determined in asymmetric nuclear matter for different temperatures and densities. We find an almost linear dependence of the single-particle potentials on the nuclear asymmetry and important effects of finite temperature, particularly at low asymmetries. It is therefore important to take into account the effect of the ground-state correlations when applying the single-particle potentials to intermediate- and high-energy heavy-ion collisions.