https://hal.in2p3.fr/in2p3-00794567Anguiano, M.M.AnguianoGrasso, M.M.GrassoIPNO - Institut de Physique Nucléaire d'Orsay - UP11 - Université Paris-Sud - Paris 11 - IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS - CNRS - Centre National de la Recherche ScientifiqueCo’, G.G.Co’de Donno, V.V.de DonnoLallena, A. M.A. M.LallenaTensor and tensor-isospin terms in the effective Gogny interactionHAL CCSD2012[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th]Heurteau, Sophie2013-02-26 10:38:142022-10-07 03:50:442013-02-26 12:33:20enJournal articles10.1103/PhysRevC.86.0543021We discuss the need of including tensor terms in the effective Gogny interaction used in mean-field calculations. 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 the N=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 parameterizations 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 parameterizations 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.