157Yb的形状共存研究

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利用在束γ谱学方法,通过反应144Sm(16O,3n)157Yb研究了157Yb的激发态能级结构. 实验中使用的16O束流能量为90MeV. 基于实验得到的γ-γ符合关系、γ射线的各向异性度和DCO系数,建议了157Yb的高自旋能级纲图. 157Yb的能级纲图主要由两串跃迁性质明显不同的级联能级组成,它们分别对应于νi13/2转动带和单粒子激发态. 着重讨论了157Yb的形状共存和νi13/2转动带随角动量的结构演化.
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