Evidence for collective oblate rotation in N = Z 68Se

被引：117

作者：

Fischer, SM ^{[1
]}

Balamuth, DP

Hausladen, PA

Lister, CJ

Carpenter, MP

Seweryniak, D

Schwartz, J

机构：

[1] De Paul Univ, Dept Phys, Chicago, IL 60614 USA

[2] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.84.4064

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A gamma-ray spectroscopic measurement of the N = Z nucleus Se-68 has been made Following the C-12(Ni-58.2n) reaction at 185 and 220 MeV using Gammasphere and the Argonne Fragment Mass Analyzer. Despite a very low production cross section of 200(50) mu b, two distinct rotational bands were found: the ground state band consistent with oblate collective rotation, and an excited band consistent with prolate rotation. These observations support long-standing predictions that nuclear ground states with substantial oblate (beta(2) similar to -0.3) deformation should exist in this region.

引用

页码：4064 / 4067

页数：4

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