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Article Dans Une Revue Phys.Rev.C Année : 2020

Temperature evolution of the nuclear shell structure and the dynamical nucleon effective mass

Herlik Wibowo
  • Fonction : Auteur
Yinu Zhang
  • Fonction : Auteur
Paolo Finelli
  • Fonction : Auteur

Résumé

We study the fermionic Matsubara Green functions in medium-mass nuclei at finite temperature. The single-fermion Dyson equation with the dynamical kernel of the particle-vibration-coupling (PVC) origin is formulated and solved in the basis of Dirac spinors, which minimize the grand canonical potential with the meson-nucleon covariant energy density functional. The PVC correlations beyond mean field are taken into account in the leading approximation for the energy-dependent self-energy, and the full solution of the finite-temperature Dyson equation is obtained for the fermionic propagators. Within this approach, we investigate the fragmentation of the single-particle states and its evolution with temperature for the nuclear systems Ni56,68 and Fe56 relevant for the core-collapse supernova. The energy-dependent, or dynamical, nucleon effective mass is extracted from the PVC self-energy at various temperatures.

Dates et versions

hal-02934070 , version 1 (08-09-2020)

Identifiants

Citer

Herlik Wibowo, Elena Litvinova, Yinu Zhang, Paolo Finelli. Temperature evolution of the nuclear shell structure and the dynamical nucleon effective mass. Phys.Rev.C, 2020, 102 (5), pp.054321. ⟨10.1103/PhysRevC.102.054321⟩. ⟨hal-02934070⟩
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