Rotation-driven prolate-to-oblate shape phase transition in 190W:: A projected shell model study

被引:40
作者
Sun, Yang [1 ,1 ,2 ]
Walker, Philip M. [3 ]
Xu, Fu-Rong [4 ,6 ]
Liu, Yu-Xin [5 ,6 ]
机构
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
[2] Univ Notre Dame, Joint Inst Nucl Astrophys, Notre Dame, IN 46556 USA
[3] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
[4] Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China
[5] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[6] Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China
基金
英国工程与自然科学研究理事会; 高等学校博士学科点专项科研基金; 中国国家自然科学基金; 美国国家科学基金会;
关键词
prolate and oblate shapes; shape phase transition; rotation alignment; projected shell model;
D O I
10.1016/j.physletb.2007.10.067
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A shape phase transition is demonstrated to occur in W-190 by applying the projected shell model, which goes beyond the usual mean-field approximation. Rotation alignment of neutrons in the high-j, i(13/2) orbital drives the yrast sequence of the system, changing suddenly from prolate to oblate shape at angular momentum 10h. We propose observables to test the picture. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:165 / 169
页数:5
相关论文
共 27 条
[21]  
REGAN PH, COMMUNICATION
[22]   Transition from spherical to deformed shapes of nuclei in the Monte Carlo shell model [J].
Shimizu, N ;
Otsuka, T ;
Mizusaki, T ;
Honma, M .
PHYSICAL REVIEW LETTERS, 2001, 86 (07) :1171-1174
[23]   Shape evolution in the neutron-rich tungsten region [J].
Stevenson, PD ;
Brine, MP ;
Podolyak, Z ;
Regan, PH ;
Walker, PM ;
Stone, JR .
PHYSICAL REVIEW C, 2005, 72 (04)
[24]   Systematic description of yrast superdeformed bands in even-even nuclei of the mass-190 region [J].
Sun, Y ;
Zhang, JY ;
Guidry, M .
PHYSICAL REVIEW LETTERS, 1997, 78 (12) :2321-2324
[25]   Energy traps in atomic nuclei [J].
Walker, P ;
Dracoulis, G .
NATURE, 1999, 399 (6731) :35-40
[26]   Prediction and possible observation of an oblate shape isomer in 190W [J].
Walker, PM ;
Xu, FR .
PHYSICS LETTERS B, 2006, 635 (5-6) :286-289
[27]   Limit to high-spin isomerism in hafnium isotopes [J].
Xu, FR ;
Walker, PM ;
Wyss, R .
PHYSICAL REVIEW C, 2000, 62 (01) :143011-143014