Shape coexistence in neutron-rich nuclei near N=40

被引：27

作者：

Carpenter, M. P. ^{[1
]}

Janssens, R. V. F. ^{[1
]}

Zhu, S. ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW C | 2013年 / 87卷 / 04期

关键词：

STATES; BANDS;

D O I：

10.1103/PhysRevC.87.041305

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：

Recent data show that both the 2(+) and 4(+) levels in the even neutron-rich Cr and Fe isotopes decrease in excitation energy toward N = 40. This observation, along with Coulomb excitation and lifetime data, strongly indicates an increase in collectivity near N = 40 in contradiction with expectations based on first principles. A straightforward two-band mixing model is used to investigate the structure of these neutron-rich Cr and Fe nuclei. The approach takes advantage of the extensive data available for Fe-60 to provide the parameter values with which to reproduce the experimental observations in the Cr58-64 and Fe60-68 isotopic chains. Comparisons between the model and the data suggest marked structural differences for the ground-state configurations of N = 40 Cr and Fe.

引用

页数：5

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