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利用能量为50MeV的12C束流,通过反应130Te(12C,3n)布居了139Ce的高自旋态.基于标准在束核谱学实验测量结果,扩展并更新了139Ce的能级纲图.139Ce的能级结构具有球形原子核的典型特征,其高自旋态由单粒子激发形成.利用经验壳模型计算了139Ce的多准粒子激发态能量,研究了其高自旋激发态的多准粒子特性.
Using a 12 C beam with an energy of 50 MeV, a high spin state of 139 Ce has been accommodated by the reaction 130Te (12C, 3n). Based on the results of standard nuclear beam spectroscopy measurements, the energy level schema of 139Ce was extended and updated. The energy structure of 139Ce has the typical characteristic of a spherical nucleus, and its high spin state is formed by single-particle excitation. The empirical shell model was used to calculate the 139Ce multi-quasiparticle excited state energy, and the multi-quasiperiodic properties of the high spin excited states were investigated.