Abstract
In this paper, the validity of the shell-evolution picture is investigated on the basis of shell-model calculations for the atomic mass number 25≲A≲55 neutron-rich nuclei. For this purpose, the so-called SDPF-MU interaction is used. Its central, two-body spin–orbit, and tensor forces are taken from a simple Gaussian force, the M3Y (Michigan 3-range Yukawa) interaction, and a π+ρ meson exchange force, respectively. Carrying out almost a complete survey of the predicted effective single-particle energies, it is confirmed here that the present scheme is quite effective for describing shell evolution in exotic nuclei.
Highlights
In Ref. [13], shell evolution is described by an interaction that consists of a simple Gaussian central force and a π + ρ meson exchange tensor force, whose choice is supported by “renormalization persistency” [16]
This interaction, named the monopole-based universal interaction, VMU, and its variant were successfully applied to constructing effective interactions for shell-model calculations [17,18], whose focuses were placed on many-body properties, such as the onset of deformation due to the tensor force
The aim of the present study is to quantitatively examine to what extent the shell evolution is described by such a simple scheme
Summary
Evolution Driven by Central, Spin-Orbit, and Tensor Forces. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. [13], shell evolution is described by an interaction that consists of a simple Gaussian central force and a π + ρ meson exchange tensor force, whose choice is supported by “renormalization persistency” [16] This interaction, named the monopole-based universal interaction, VMU , and its variant were successfully applied to constructing effective interactions for shell-model calculations [17,18], whose focuses were placed on many-body properties, such as the onset of deformation due to the tensor force.
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