Shell model study for neutron-rich sd-shell nuclei
Kazunari Kaneko, Yang Sun, Takahiro Mizusaki, Munetake Hasegawa
TL;DR
This paper uses an extended shell-model approach to analyze the structure of neutron-rich sd-shell nuclei, successfully reproducing known energy levels and explaining shell closure erosion, with comparisons to other models.
Contribution
Introduces the EPQQM shell-model framework for neutron-rich sd-shell nuclei, providing systematic reproduction of energy levels and insights into shell closure erosion.
Findings
Reproduces known energy levels of sd-shell nuclei
Explains erosion of N=28 shell closure in 42Si
Compares favorably with other shell-model interactions
Abstract
The microscopic structure of neutron-rich sd-shell nuclei is investigated by using the spherical shell-model in the sd-pf valence space with the extended pairing plus quadrupole-quadrupole forces accompanied by the monopole interaction (EPQQM). The calculation reproduces systematically the known energy levels for even-even and odd-mass nuclei including the recent data for 43S, 46S and 47Ar. In particular, the erosion of the N=28 shell closure in 42Si can be explained. Our EPQQM results are compared with other shell-model calculations with the SDPF-NR and SDPF-U effective interactions.
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