Half-life of the yrast 2+ state in 188W: Evolution of deformation and collectivity in neutron-rich tungsten isotopes

被引：25

作者：

Mason, P. J. R. ^{[1
]}

Podolyak, Zs. ^{[1
]}

Marginean, N. ^{[2
]}

Regan, P. H. ^{[1
,3
]}

Stevenson, P. D. ^{[1
]}

Werner, V. ^{[4
]}

Alexander, T. ^{[1
]}

Algora, A. ^{[5
,6
]}

Alharbi, T. ^{[1
,7
]}

Bowry, M. ^{[1
]}

Britton, R. ^{[1
]}

Bruce, A. M. ^{[8
]}

Bucurescu, D. ^{[2
]}

Bunce, M. ^{[1
]}

Cata-Danil, G. ^{[2
]}

Cata-Danil, I. ^{[2
]}

Cooper, N. ^{[4
]}

Deleanu, D. ^{[2
]}

Delion, D. ^{[2
]}

Filipescu, D. ^{[2
]}

Gelletly, W. ^{[1
]}

Ghita, D. ^{[2
]}

Gheorghe, I. ^{[2
]}

Glodariu, T. ^{[2
]}

Ilie, G. ^{[4
]}

Ivanova, D. ^{[9
]}

Kisyov, S. ^{[9
]}

Lalkovski, S. ^{[9
]}

Lica, R. ^{[2
]}

Liddick, S. N. ^{[10
]}

Marginean, R. ^{[2
]}

Mihai, C. ^{[2
]}

Mulholland, K. ^{[11
,12
]}

Nita, C. R. ^{[2
]}

Negret, A. ^{[2
]}

Pascu, S. ^{[2
]}

Rice, S. ^{[1
]}

Roberts, O. J. ^{[8
]}

Sava, T. ^{[2
]}

Smith, J. F. ^{[11
,12
]}

Soederstroem, P. -A. ^{[13
]}

Stroe, L. ^{[2
]}

Suliman, G. ^{[2
]}

Suvaila, R. ^{[2
]}

Toma, S. ^{[2
]}

Townsley, C. ^{[1
]}

Wilson, E. ^{[1
]}

Wood, R. T. ^{[1
]}

Zhekova, M. ^{[9
]}

Zhou, C. ^{[4
]}

机构：

[1] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[2] Horia Hulubei Natl Inst Phys & Nucl Engn IFIN HH, RO-077125 Bucharest, Romania

[3] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[4] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA

[5] Univ Valencia, CSIC, IFIC, Valencia 46071, Spain

[6] MTA ATOMKI, H-4001 Debrecen, Hungary

[7] Almajmaah Univ, Coll Sci Zulfi, Dept Phys, Riyadh 11932, Saudi Arabia

[8] Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England

[9] Univ Sofia, Dept Phys, Sofia 1164, Bulgaria

[10] Michigan State Univ, NSCL, E Lansing, MI 48824 USA

[11] Univ West Scotland, Paisley PA1 2BE, Renfrew, Scotland

[12] Univ Glasgow, SUPA, Glasgow, Lanark, Scotland

[13] RIKEN, Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW C | 2013年 / 88卷 / 04期

基金：

英国工程与自然科学研究理事会; 英国科学技术设施理事会; 日本学术振兴会;

关键词：

NUCLEAR-DATA SHEETS;

D O I：

10.1103/PhysRevC.88.044301

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 half-life of the yrast I-pi = 2(+) state in the neutron-rich nucleus W-188 has been measured using fast-timing techniques with the HPGe and LaBr3:Ce array at the National Institute of Physics and Nuclear Engineering, Bucharest. The resulting value of t(1/2) = 0.87(12) ns is equivalent to a reduced transition probability of B(E2;2(1)(+) -> 0(1)(+)) = 85(12) W.u. for this transition. The B(E2;2(1)(+) -> 0(1)(+)) is compared to neighboring tungsten isotopes and nuclei in the Hf, Os, and Pt isotopic chains. Woods-Saxon potential energy surface (PES) calculations have been performed for nuclei in the tungsten isotopic chain and predict prolate deformed minima with rapidly increasing gamma softness for W184-192 and an oblate minimum for W-194.

引用

页数：6

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