Seniority and (9/2)n configurations in neutron-rich Nickel isotopes

被引：2
|
作者：
Sidorov, S. [1 ,2 ]
Zhulyaeva, D. [1 ]
Tretyakova, T. [1 ,2 ]
机构：
[1] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia
[2] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
来源：
CHINESE PHYSICS C | 2022年 / 46卷 / 07期
关键词：
shell model; nucleon pairing; seniority scheme; neutron-rich isotopes; NUCLEAR-DATA SHEETS; PARTIAL CONSERVATION; COMPLEX SPECTRA; TRANSITIONS; ISOMERS;
D O I：
10.1088/1674-1137/ac5d29
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Excited states in low-energy spectra of Ni70-76 are considered. Accordingly, pairing forces in the form of surface delta interaction are employed to account for the formation of the ground state multiplet with seniority nu = 2 states. The multiplet splitting is described with mass relationships of masses of neighboring nuclei. Subsequently, the seniority model is adopted to reproduce or predict the states nu = 3 in odd-even isotopes and nu = 4 in even-even isotopes. The correct account of the 2(1)(+) state should allow for the description of the reversed order of J = 4 states with nu = 2 and nu = 4 observed in experiments. The results obtained are compared with the structure of similar multiplets in N = 50 isotones.
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页数：9
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