High-Spin $\gamma$-Ray Spectroscopy of $^{165}$W and $^{166}$W
High-Spin $\gamma$-Ray Spectroscopy of $^{165}$W and $^{166}$W
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$^{165}$W 和 $^{166}$W 的高自旋 $gamma$ 射线光谱
DOI：
10.1088/0954-3899/18/7/010
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
L. Walker
中科院分区：
文献类型：
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作者：
J. Simpson;F. Hanna;M. Riley;A. Alderson;M. Bentley;A. Bruce;D. Cullen;P. Fallon;L. Walker
分别用106Pd(63Cu，p3n)和106Pd(63Cu，p2n)反应研究了165W和166W的高自旋态。利用伽马射线探测器阵列POLYTESSA和达累斯伯里反冲分离器首次识别出165W的伽马射线。根据POLYTESSA和TESSA3阵列的伽马-伽马符合数据和角相关数据构造了165W和166W的能级方案。在166W中，建立了高达30+(32+)的yrast频带，以及高达22-(28-)和23-(29-)的两个边带。在165W中，建立了高达45/2+的yrast带和高达55/2-(59/2-)和53/2-的两个边带。在曲折壳模型的框架内，用准粒子激发解释了观察到的转动结构和能带交叉。讨论了N=91和92同位素中第二次I13/2中子排列的系统学。
High-spin states of 165W and 166W were studied using the 106Pd(63Cu, p3n) and 106Pd(63Cu, p2n) reactions, respectively. Gamma rays in 165W were identified for the first time using the gamma -ray detector array POLYTESSA and the Daresbury recoil separator. Level schemes for 165W and 166W were constructed from the gamma - gamma coincidence data and angular correlation data from the POLYTESSA and TESSA3 arrays. In 166W the yrast band is established up to 30+ (32+), as well as two side bands up to 22- (28-) and 23- (29-). In 165W the yrast band is established up to 45/2+ and two side bands up to 55/2- (59/2-) and 53/2-. The rotational structures and band crossings observed are interpreted within the framework of the cranked shell model in terms of quasiparticle excitations. The systematics of the second i13/2 neutron alignment in the N=91 and 92 isotones are discussed.