Detailed γ-ray spectroscopy of 55Cr and 56Cr:: Confirmation of the subshell closure at N=32 -: art. no. 034309

被引：41

作者：

Appelbe, DE ^{[1
]}

Barton, CJ

Muikku, MH

Simpson, J

Warner, DD

Beausang, CW

Caprio, MA

Cooper, JR

Novak, JR

Zamfir, NV

Austin, RAE

Cameron, JA

Malcolmson, C

Waddington, JC

Xu, FR

机构：

[1] SERC, Daresbury Lab, CLRC, Warrington WA4 4AD, Cheshire, England

[2] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06511 USA

[3] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[4] Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China

[5] Clark Univ, Worcester, MA 01610 USA

[6] Natl Inst Phys & Nucl Engn, Bucharest, Romania

来源：

PHYSICAL REVIEW C | 2003年 / 67卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.67.034309

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 nuclei Cr-55,Cr-56 were populated to high spin following the reaction Ca-48(B-11,pxn)Cr58-x at a beam energy of 35-40 MeV. The level scheme of Cr-55 has been confirmed and extended to J(pi)=25+/2. The level scheme of Cr-56 has been extended to J=13. The spins and parity of the majority of levels have been determined unambiguously for the first time. The first firm evidence for an intruder band based on the nug(9/2) orbital has been observed in Cr-55. In Cr-56, the position of the first 4(+) state has been determined unambiguously and the presence of a subshell closure at N = 32 has been confirmed on the basis of the E-41(+)/E-21(+) systematics. The properties of both nuclei are compared with total Routhian surface calculations and with previous predictions of subshell closures at N = 32 and 34. The systematics in the region are discussed in terms of the strong nuf(5/2)-pif(7/2) interaction and its effect on the underlying single-particle structure.

引用

页码：343091 / 343098

页数：8

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