Competition between collective oblate rotation and non-collective prolate K isomerism in neutron-rich tungsten isotopes

被引：0
|
作者：
WALKER P M
机构：
[1] CERN,CH-1211 Geneva 23,Switzerland
[2] Department of Physics,University of Surrey,Guildford,Surrey GU2 7XH,United Kingdom
来源：
Science China(Physics,Mechanics & Astronomy) | 2012年 / Mechanics & Astronomy)2012卷 / 09期
基金：
中国国家自然科学基金;
关键词：
prolate and oblate shapes; isomers; rotational alignment; projected shell model;
D O I：
暂无
中图分类号：
O562.6 [同位素];
学科分类号：
摘要：
Recent experiments open up the possibility to investigate oblate rotation-aligned states and prolate high-K isomers in neutron-rich tungsten isotopes.In the present work,we perform the projected-shell-model calculations for A ～ 190 tungsten nuclei.The 190 W results are compared with experimental data.The observed 8 + isomer is assigned as a two-quasiproton K π = 8 + configuration.Low-lying high-K four-quasiparticle states are predicted.Of particular interest is the prediction of the K π = 20 + state in 190,192 W,which may form a long-lived spin trap.In competition with the prolate high-K states,rotational alignment leads to near-yrast collective oblate rotation.
引用
收藏
页码：1613 / 1617
页数：5
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