Doublet bands in 128La and systematic features of energy separationof doublet bands observed in the A～130 mass region

High spin states of 128La have been studied through the fusion-evaporation reaction 118Sn（14N,4n） 128La at a beam energy of 69 MeV. A positive-parity side band with the same configuration as that of the yrast band has been identified. Moreover, it is noted that the energy separation △E（I） = E（I）side...

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Published in:中国物理C：英文版 2013 (4), p.39-42
Main Author: 马克岩 陆景彬 杨东 王辉东 刘运祚 李剑 刘弓冶 李黎 马英君 吴晓光 李广生 郑云 贺创业
Format: Article
Language:English
Subjects:
双峰
模式系统
熔合蒸发反应
电子束能量
能源
质量
频段
高自旋态
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Summary:High spin states of 128La have been studied through the fusion-evaporation reaction 118Sn（14N,4n） 128La at a beam energy of 69 MeV. A positive-parity side band with the same configuration as that of the yrast band has been identified. Moreover, it is noted that the energy separation △E（I） = E（I）side-E（I）yrast of all doublet bands reported in odd-odd nuclei in the A～130 mass region exhibit a staggering pattern systematically, and they stagger up at even-spin and stagger down at odd-spin.
ISSN:1674-1137
0254-3052