Étude de la structure nucléaire des noyaux pair-pairs au voisinage de l'étain 132 au moyen du code Oxbash.

Abstract

Nowadays, the role of the monopole interaction between the core and the valence particles in the description of the properties of the nuclear structure is a main subject in the field of microscopic calculations of many nucleons. In order to reproduce the experimental data of even-even nuclei (Z=50 and N=82) with two, four, six and eight valence nucleons: 134-136-138-140Sn and 134Te, 136Xe, 138Ba et 140Ce respectivelly in the region of 132Sn mass region, and to provide new informationon on this type of nuclei, we have made some modifications on the kh5082 origenal interaction based of monopole effect that we use as a starting point to get the mkh3 interaction in the Z50N82 model space. Recent experimental values of the individual particle energies are used. Calculations are made in the spherical shell model using the Oxbash nuclear structure code. In this context, we calculated excitation energies, reduced electric transition probabilities B(E2) and electromagnetic multipole moments µ and Q, for studied nuclei. The getting results are in agreements with the existing expérimental data. In these calculations, we used the single particle Landau factors and and the free proton charge of the individual particle. The half-life and nuclear matrix element M2ν of 48Ca nucleus by double beta decay are calculated. The value we propose for