Is seniority a partial dynamic symmetry in the first $g_{9/2}$ shell?

Morales, A. I.*; Orlandi, R. ; 61 of others*

By studying the decay of the radioactive nuclei $^{72}$ Co and $^{74}$ Co produced at RIBF, RIKEN, the low-lying excited states in $^{72,74}$ Ni were studied for the first time up to spin 8. These states originate from the valence neutrons occupying the $g_{9/2}$ orbit, and permit to investigate the seniority quantum number. The data reveal that the seniority isomerism of the 8 state disappears, and this phenomenon is explained by comparison with shell model calculations and the influence of spherical doubly-magic $^{78}$ Ni.

Language	:	English
Journal	:	Physics Letters B
Volume	:	781
Number	:
Pages	:	p.706 - 712
Publication Year/Month	:	2018/06
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Paper URL	:	https://doi.org/10.1016/j.physletb.2018.04.049
DOI for research data	:
Keywords	:	no keyword
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Registration No. : AA20180249
JAEA Abstracts No. : 46000774
Paper Submission No. : 20352

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Is seniority a partial dynamic symmetry in the first shell?

Is seniority a partial dynamic symmetry in the first $g_{9/2}$ shell?