A mean field study of single-particle spectra evolution in Z=14 and N=28 chains

Abstract

We study the mechanisms which reduce the proton 1d(3/2)-1d(5/2) spin-orbit splitting and the neutron 1f(7/2) subshell closure in 42Si. We use various self-consistent mean field models: non-relativistic Skyrme-Hartree-Fock and relativistic density-dependent Hartree-Fock. Special attention is devoted to the influence of a tensor component in the effective interaction. It is found that the tensor force indeed governs the reduction of the 1d proton spin-orbit splitting. On the other hand, the reduction of the neutron 1f(7/2) subshell closure is not clearly related to the tensor force.

arXiv commentSubmited in PRC. 6 pages, 4 figures, 2 tables

References in corpus (7)

• The tensor part of the Skyrme energy density functional. I. Spherical nuclei
• Collapse of the N=28 shell closure in ${}^{42}$Si
• Density-Dependent Relativistic Hartree-Fock Approach
• Spin-orbit splitting and the tensor component of the Skyrme interaction
• Evolution of Nuclear Shell Structure due to the Pion Exchange Potential
• Evolution of nuclear shells with the Skyrme density dependent interaction
• Evolution of the proton sd states in neutron-rich Ca isotopes

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