Matter distribution and spin-orbit force in spherical nuclei
Abstract
We investigate the possibility that some nuclei show density distributions with a depletion in the center, a semi-bubble structure, by using a Hartree-Fock plus Bardeen-Cooper-Schrieffer approach. We separately study the proton, neutron and matter distributions in 37 spherical nuclei mainly in the shell region. We found a relation between the semi-bubble structure and the energy splitting of spin-orbit partner single particle levels. The presence of semi-bubble structure reduces this splitting, and we study its consequences on the excitation spectrum of the nuclei under investigation by using a quasi-particle random-phase-approximation approach. The excitation energies of the low-lying states can be related to the presence of semi-bubble structure in nuclei.
Cite
@article{arxiv.1712.05186,
title = {Matter distribution and spin-orbit force in spherical nuclei},
author = {G. Co' and M. Anguiano and V. De Donno and A. M. Lallena},
journal= {arXiv preprint arXiv:1712.05186},
year = {2018}
}
Comments
15 pages, 7 tables, 11 figures. Version accepted for publication in Phys. Rev. C; the number of nuclei analysed has been reduced; some figure have bee redrawn, and a new figure and some references have been added