Temperature dependence of the nuclear binding energy: effects on the EOS for hot nuclear matter using different models

Abstract

Effects due to the temperature dependence of the nuclear binding energy upon the equation of state (EOS) for hot nuclear matter are studied. Nuclear contributions to the free energy are represented by temperature dependent liquid drop model terms.Phase coexistence is assumed for temperatures of the order of 1MeV ⩽ T ⩽ 6 MeV, baryon number densities ρ of the order of 10−4 fm−3 ⩽ ρ ⩽ 10−1 fm−3 and lepton fractions of the order of 0.2 ⩽ y1 ⩽ 0.4. It is found that the total pressure of the system is not affected by the temperature dependence of the nuclear free energy, in spite of changes observed in the nuclear pressure due to the different parametrizations used to represent the nuclear binding energy.