Shape coexistence effects and quasiparticle alignment in 81Sr.
Shape coexistence effects and quasiparticle alignment in 81Sr.
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81Sr 中的形状共存效应和准粒子排列。
DOI：
10.1103/physrevc.38.696
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Nazarewicz
中科院分区：
文献类型：
--
作者：
Moore;Cottle;Gross;Headly;Huettmeier;Tabor;Nazarewicz
利用在束技术研究了103.6MeV的/sup 56/Fe（/sup 28/Si，2 pn）和95.2MeV的/sup 55/Mn（/sup 29/Si，p2 n）反应中/sup 81/Sr的高自旋态.伽马.. -射线光谱学测量是由...伽马.. -..伽马..巧合和..伽马.. -定向核的射线方向相关。用多普勒频移衰减法测定了12个态的寿命和10个态的寿命极限。数据进行了分析的伍兹-撒克逊曲柄模型。在yrast带中观察到的第一个交叉归因于一对g/sub 9/2/质子的排列。在J/sup（2）/惯性矩中观察到的不规则性在K/sup. pi../ =（5/2/sup -/）和1/2/sup（+）/带也被解释为g/sub 9/2/质子对排列的证据。从奇中子对软偶核极化的角度讨论了低自旋下长扁组态的共存。
High spin states in /sup 81/Sr were investigated in the reactions /sup 56/Fe(/sup 28/Si,2pn) at 103.6 MeV and /sup 55/Mn(/sup 29/Si,p2n) at 95.2 MeV using the techniques of in-beam ..gamma..-ray spectroscopy. Measurements were made of ..gamma..-..gamma.. coincidences and ..gamma..-ray directional correlations from oriented nuclei. The lifetimes of 12 states and lifetime limits of 10 others were determined with the Doppler shift attenuation method. The data have been analyzed in terms of the Woods-Saxon cranking model. The first crossing observed in the yrast band is attributed to the alignment of a pair of g/sub 9/2/ protons. The irregularities observed in the J/sup (2)/ moment of inertia in the K/sup ..pi../ = (5/2/sup -/ and 1/2/sup (+)/ bands are interpreted as evidence for the alignment of a g/sub 9/2/ proton pair as well. The coexistence of prolate and oblate configurations at low spin is discussed in terms of the polarization of the soft even-even core by the odd neutron.