Determining the energy barrier for decay out of superdeformed bands

被引：3
|
作者：
Barrett, B. R. [1 ]
Buerki, J. [1 ]
Cardamone, D. M. [2 ]
Stafford, C. A. [1 ]
Stein, D. L. [3 ,4 ]
机构：
[1] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[2] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
[3] NYU, Dept Phys, New York, NY 10003 USA
[4] NYU, Courant Inst Math Sci, New York, NY 10003 USA
来源：
PHYSICS LETTERS B | 2010年 / 688卷 / 01期
关键词：
Superdeformed decay; Two-state model of SD decay; Quantum-mechanical path integrals; STATES; PB-194;
D O I：
10.1016/j.physletb.2010.03.052
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An asymptotically exact quantum mechanical calculation of the matrix elements for tunneling through an asymmetric barrier is combined with the two-state statistical model for decay out of superdeformed bands to determine the energy barrier (as a function of spin) separating the superdeformed and normal-deformed wells for several nuclei in the 190 and 150 mass regions. The spin-dependence of the barrier leading to sudden decay out is shown to be consistent with the decrease of a centrifugal barrier with decreasing angular momentum. Values of the barrier frequency in the two mass regions are predicted. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：110 / 113
页数：4
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