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Article Dans Une Revue Phys.Rev.C Année : 2016

Occupation numbers of spherical orbits in self-consistent beyond-mean-field methods

Résumé

We present a method to compute the number of particles occupying spherical single-particle (SSP) levels within the energy density functional (EDF) framework. These SSP levels are defined for each nucleus by performing self-consistent mean-field calculations. The nuclear many-body states, in which the occupation numbers are evaluated, are obtained with a symmetry conserving configuration mixing (SCCM) method based on the Gogny EDF. The method allows a closer comparison between EDF and shell model with configuration mixing in large valence spaces (SM-CI) results, and can serve as a guidance to define physically sound valence spaces for SM-CI calculations. As a first application of the method, we analyze the onset of deformation in neutron-rich N=40 isotones and the role of the SSP levels around this harmonic oscillator magic number, with particular emphasis in the structure of Cr64.

Dates et versions

hal-01553988 , version 1 (03-07-2017)

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Tomás R. Rodríguez, Alfredo Poves, Frédéric Nowacki. Occupation numbers of spherical orbits in self-consistent beyond-mean-field methods. Phys.Rev.C, 2016, 93 (5), pp.054316. ⟨10.1103/PhysRevC.93.054316⟩. ⟨hal-01553988⟩
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