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¹³⁹Pm核中磁转动带的研究

Study of Magnetic Rotational Bands in ¹³⁹Pm Nucleus

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【作者】张宁涛；张玉虎；周小红；柳敏良；郑勇；郭应祥；雷祥国；丁兵；胡钧；马飞；陈亮；王世陶；吴晓光；郑云；

【Author】 ZHANG Ning-tao1,2,1),ZHANG Yu-hu1,ZHOU Xiao-hong1,LIU Min-liang1,ZHENG Yong1, GUO Ying-xiang1,2,LEI Xiang-guo1,2,DING Bin1,2,HU Jun1,2,MA Fei1,2, CHEN Liang1,2,WANG Shi-yao1,2,WU Xiao-guang3,ZHENG Yun3 (1.Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China;3.China Institute of Atomic Energy,Beijing 102413,China)

【机构】中国科学院近代物理研究所；中国科学院研究生院；中国原子能研究院；

【摘要】通过重离子熔合蒸发反应116Cd(27Al,4n)布居了139Pm的高自旋激发态,用12台高纯锗探测器(HpGe)阵列进行了在束γ-γ符合测量。基于γ-γ符合关系及139Pm核已知的能级信息,建立了两条ΔI=1的负宇称带。利用相邻核能级结构的系统性和依据半经典的核子-核子有效作用的理论模型(SPAC)对这两条带能级结构进行了定量计算,认为它们属于磁转动带。更多还原

【Abstract】 High-spin states in 139Pm have been studied via the 116Cd(27Al,4n) heavy-ion fusion-evaporation reaction.The γ-γ coincidences were measured with 12 HpGe detectors.Based on γ-γ coincidence relationships and previously known levels in 139Pm,two ΔI=1 negative-parity bands have been established.From the systematic comparison with the neighbouring nuclei and semi-classical effective interaction model(SPAC) calculations,the two bands were suggested as magnetic rotational bands.更多还原