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Nouvelles paramétrisations de l'interaction nucléaire effective de Gogny

Frédéric Chappert 1
1 DPTA - Département de Physique Théorique et Appliquée
DAM/DIF - DAM Île-de-France : DAM/DIF
Abstract : The effective interaction between nucleons is the basic input to microscopic calculations
in nuclear structure. One of the forms used since the 1970's is the phenomenological
effective force proposed by D. Gogny. This force gives excellent results in nuclei
at the mean-field approximation. The presence of contact terms does not allow, however,
to use it for the description of beyond mean-field correlations present in nuclei.

In this work, we investigate some extensions of the Gogny force, and especially a generalization
in which the zero range density dependent term has been replaced by a finite range term. The parameters occuring
in the analytical form of the force have been adjusted on symmetric infinite nuclear matter and neutron matter
properties, and on some selected observables for stable nuclei, especially those related to pairing correlations.
We present the method to include this kind of force in Hartree-Fock-Bogoliubov calculations
and we analyze the results obtained for various nuclei. The new versions of the Gogny force allow to reproduce
nuclear structure properties with improved accuracy as compared to the former version.
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Submitted on : Monday, October 8, 2007 - 9:25:37 AM
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Frédéric Chappert. Nouvelles paramétrisations de l'interaction nucléaire effective de Gogny. Physique Nucléaire Théorique [nucl-th]. Université Paris Sud - Paris XI, 2007. Français. ⟨tel-00177379⟩

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