Systematic study of the thermal pairing re-entrance in the 72Ti nucleus

Abstract

Finite-temperatureHartree-Fock-Bogoliubov calculations are performed in 72Ti usingSkyrme interactions, to predict the finite-temperature pairing re-entrancephenomenon for the system of neutrons. It is also shown that pairing re-entrancemodifies the neutron single-particle energies around the Fermi level, as wellas occupation numbers and quasiparticle levels. It is also shown that neutronresonant states are expected to contribute substantially to pairingcorrelations and the two predicted critical temperatures are Tc1=0.1-0.2MeVand Tc2=0.7-0.9 MeV. On theother hand, Our results for the ground-state energies, proton and neutronseparation energies are in very good agreement with experiment where available.