Half-life of the yrast 2 + state in 188W: evolution of deformation and collectivity in neutron-rich tungsten isotopes-猫眼课题宝

DOI：

10.1103/physrevc.88.044301

发表时间：

2013-10

期刊：

Physical Review C

影响因子：

3.1

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

P. Mason;Z. Podolyák;N. Mărginean;P. Regan;P. Stevenson;V. Werner;T. Alexander;A. Algora;T. Alharbi;M. Bowry;R. Britton;A. Bruce;D. Bucurescu;M. Bunce;G. Cǎta-Danil;I. Cǎta-Danil;N. Cooper;D. Deleanu;D. Delion;D. Filipescu;W. Gelletly;D. Ghita;I. Gheorghe;T. Glodariu;G. Ilie;D. Ivanova;S. Kisyov;S. Lalkovski;R. Lica;S. Liddick;R. Mǎrginean;C. Mihai;K. Mulholland;C. Nita;A. Negret;S. Pascu;S. Rice;O. Roberts;T. Sava;J. Smith;P. Söderström;L. Stroe;G. Suliman;R. Șuvăilă;S. Toma;C. Townsley;E. Wilson;R. Wood;M. Zhekova;C. Zhou

在布加勒斯特的国家物理与核工程研究所用HPGe和LaBr_3：Ce阵列，用快定时技术测量了丰中子核188 W中yraast I π = 2+态的半衰期。得到的t12 = 0.87（12）ns的值相当于降低的跃迁概率B（E2; 2+ 1 → 0+ 1）= 85（12）W. u。对于这个过渡。将B（E2; 2+ 1 → 0+ 1）与Hf、Os和Pt同位素链中的相邻钨同位素和核进行比较。Woods-Saxon势能面（PES）计算了钨同位素链中的原子核，预测了184- 192 W原子核的扁长形变极小值和194 W原子核的扁扁形变极小值。

The half-life of the yrast I π = 2+ state in the neutron-rich nucleus 188W 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 t1/2 = 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 γ softness for 184–192W and an oblate minimum for 194W.

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

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