The N=28 shell closure;: from N = Z to the neutron drip line

被引：57

作者：

Caurier, E

Nowacki, F

Poves, A

机构：

[1] Univ Strasbourg 1, Grp Phys Theor, IReS, IN2P3,CNRS, F-67037 Strasbourg 2, France

[2] Univ Autonoma Madrid, Dept Fis Teor C 11, E-28049 Madrid, Spain

来源：

NUCLEAR PHYSICS A | 2004年 / 742卷 / 1-2期

关键词：

shell model; effective interactions; full pf-shell spectroscopy; level schemes and transition probabilities;

D O I：

10.1016/j.nuclphysa.2004.06.032

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：

The evolution of the N = 28 neutron shell closure is studied in the N = 28 isotones from neutron drip line's Mg-40 to N = Z doubly magic Ni-56. It is found that the N = 28 closure vanishes at Z = 12 in favor of a deformed ground state. For Z = 14 and Z = 16 closed shell and intruder configurations are almost degenerate, leading to highly mixed ground states and to very low lying excited 0(+) states. For Z > 20 the intruder states are always above the closed shell ground states. We examine their structure and their possible existence as collective yrare bands of well-defined particle-hole character. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：14 / 26

页数：13

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