NUCLEON SELF-ENERGIES AND SPECTRAL FUNCTIONS IN NUCLEAR-MATTER AT FINITE-TEMPERATURE WITH A REALISTIC POTENTIAL

We use a separable form of the Paris nucleon-nucleon interaction to ca lculate nucleon self-energies and spectral functions at the saturation density of symmetric nuclear matter at finite temperature. The behavi our of these quantities at temperatures above and close to the critica l temperature for the superfluid phase transition in nuclear matter is investigated. From the self-energy the spectral function and occupati on numbers at finite temperature are calculated. The sensitivity of th e results for the realistic nucleon-nucleon potential to details of th e interaction potential is studied by a comparison to an exploratory c alculation previously done for the purely attractive Yamaguchi potenti al.