First observation of excited states in 87 Se: Collectivity and j - 1 anomaly at N = 53
First observation of excited states in 87 Se: Collectivity and j - 1 anomaly at N = 53
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首次观察到 87 Se 的激发态：N = 53 处的集体性和 j - 1 异常
DOI：
10.1103/physrevc.88.034302
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发表时间：
2013
影响因子：
3.1
通讯作者：
Rzaca-Urban T
中科院分区：
文献类型：
--
作者：
Rzaca-Urban T
用Eurom2 Ge阵列测量Cm裂变后的射线，通过X射线能谱研究了Se核。第一次观察到硒的激发能级。该核的最后激发方案与邻近核的激发方案相似，符合能量系统学，显示出以下异常。大规模的壳模型计算再现详细的yrast激发在硒和其他isotones。解释了这种反常现象是由于质子中壳层集体性增强所致。集体和单粒子激发的共存是在硒预测。
TheSe nucleus has been studied via prompt-ray spectroscopy using the Eurogam2 Ge array to measurerays following fission ofCm. Excited levels inSe have been observed for the first time. The yrast excitation scheme in this nucleus is similar to the excitations schemes of itsneighbors and fits the energy systematics, indicatinganomaly below. Large-scale shell-model calculations reproduce in detail yrast excitations inSe and otherisotones. Theanomaly is explained as due to the enhancement of collectivity towards the proton midshell. The coexistence of collective and single-particle excitations is predicted inSe.