Single-Particle and Collective Structures in Neutron-Rich Sr Isotopes

被引：7

作者：

Sieja, Kamila ^{[1
]}

机构：

[1] Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France

来源：

UNIVERSE | 2022年 / 8卷 / 01期

关键词：

nuclear structure; shell model; neutron-rich nuclei; spectroscopy; shape transition; SHELL-MODEL DESCRIPTION; TRANSITION; STATES;

D O I：

10.3390/universe8010023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Neutron-rich Sr nuclei around N=60 exhibit a sudden shape transition from a spherical ground state to strongly prolate-deformed. Recently, much new insight into the structure of Sr isotopes in this region has been gained through experimental studies of the excited levels, transition strengths, and spectroscopic factors. In this work, a "classic " shell model description of strontium isotopes from N=50 to N=58 is provided, using a natural valence space outside the Ni-78 core. Both even-even and even-odd isotopes are addressed. In particular, spectroscopic factors are computed to shed more light on the structure of low-energy excitations and their evolution along the Sr chain. The origin of deformation at N=60 is mentioned in the context of the present and previous shell model and Monte Carlo shell model calculations.

引用

页数：15

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