Global nuclear structure effects of tensor interaction

Abstract

A direct fit of the isoscalar spin-orbit (SO) and both isoscalar and isovector tensor coupling constants to the f5/2-f7/2 SO splittings in 40Ca, 56Ni, and 48Ca nuclei requires a drastic reduction of the isoscalar SO strength and strong attractive tensor coupling constants. The aim of this work is to address further consequences of these strong attractive tensor and weak SO fields on binding energies, nuclear deformability, and high-spin states. In particular, we show that contribution to the nuclear binding energy due to the tensor field shows generic magic structure with tensorial magic numbers at N(Z)=14, 32, 56, or 90 corresponding to the maximum spin-asymmetries in 1d5/2, 1f7/2-2p3/2, 1g9/2-2d5/2 and 1h11/2-2f7/2 single-particle configurations and that these numbers are smeared out by pairing correlations and deformation effects. We also examine the consequences of strong attractive tensor fields and weak SO interaction on nuclear stability at the drip lines, in particular close to the tensorial doubly magic nuclei and discuss the possibility of an entirely new tensor-force driven deformation effect.

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• Global nuclear structure aspects of tensor interaction
• Shell-structure fingerprints of tensor interaction
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Cited by in corpus (13)

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• Tensor parameters in Skyrme and Gogny effective interactions: Trends from a ground-state-focused study
• Effective density functionals beyond mean field
• Shell evolution and its indication on the isospin dependence of the spin-orbit splitting
• Magicity of the ${}^{52}$Ca and ${}^{54}$Ca isotopes and tensor contribution within a mean--field approach
• Effects of tensor interaction on pseudospin energy splitting and shell correction
• Natural Units For Nuclear Energy Density Functional Theory
• Neutron $2p$ and $1f$ spin--orbit splittings in ${}^{40}$Ca, ${}^{36}$S, and ${}^{34}$Si $N=20$ isotones: tensor--induced and pure spin--orbit effects
• Surface-peaked effective mass in the nuclear energy density functional and its influence on single-particle spectra
• Impact of finite-range spin-orbit and tensor terms in Gogny EDF