Abstract

We show in one illustrative case that, with the usual tensor term that is employed in the Skyrme interaction (and that allows us to separate the like–nucleon and the neutron-proton tensor contributions), we can describe the evolution of theN = 28 neutron gap in calcium isotopes.We propose to include a tensor and a tensor-isospin term in finite-range interactions of Gogny type. The parameters of the two tensor terms allow us to treat separately the like-nucleon and the neutron-proton contributions. Two parametrizations of the tensor terms have been chosen to reproduce different neutron single-particle properties in the 48Ca nucleus and the energy of the first 0− state in the 16O nucleus. By employing these two parametrizations we analyze the evolution of the N = 14, 28, and 90 neutron energy gaps in oxygen, calcium, and tin isotopes, respectively. We show that the combination of the parameters governing the like-nucleon contribution is crucial to correctly reproduce the experimental (where available) or shell-model trends for the evolution of the three neutron gaps under study.

Autore Pugliese

• Co' Giampaolo

Tutti gli autori

• Anguiano M. , Grasso M. , Co’ G. , De Donno V. , Lallena A. M.

Titolo volume/Rivista

PHYSICAL REVIEW. C, NUCLEAR PHYSICS

Anno di pubblicazione

2012

ISSN

0556-2813

ISBN

Non Disponibile

Numero di citazioni Wos

30

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

27

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile