摘要
通过重离子熔合蒸发反应^(82)Se(^(18)O,p5n)^(94)Nb布居了94Nb的高自旋态,实验中使用的18O束流由中国原子能科学研究院的HI-13串列加速器提供,束流能量为82和88 MeV。在前人工作的基础上发现了13条新的γ跃迁并调整了部分能级的摆放位置,将^(94)Nb的自旋推至24^(-),激发能至10.6 MeV,结合DCO比值和线极化测量对部分能级的自旋、宇称进行了指定。在质子π(1f_(5/2),2p_(3/2),2_(P1/2),lg_(9/2))和中子(2p_(1/2),1g_(9/2),2d_(5/2),1g_(7/2))空间下将^(94)Nb的能级结构与壳模型计算结果进行了比较,并探讨了^(94)Nb的中子质子激发机制。
High spin states of ^(94)Nb have been studied with the ^(82)Se(18O,p5n)^(94)Nb fusion evaporation reaction at beam energy of 82 and 88 MeV.The experiment was performed at the HI-13 tandem accelerator of the China Institute of Atomic Energy.The previously reported level schemes of ^(94)Nb have been extended and modified up to an excitation energy of 10.6 MeV and a spin and parity of 24(−)with 13 newγ-transitions.Based on DCO ratios and linear polarization measurements,spin-parity have been assiged up to the highest level observed.The level structures in 94Nb have been interpreted in terms of the shell model calculations performed in the configuration spaceπ(1f_(5/2),2p_(3/2),2p_(1/2),1g_(9/2))for the protons andν(2p_(1/2),1g_(9/2),1g_(7/2),2d_(5/2))for the neutrons,and the neutron proton excitation mechanism of ^(94)Nb was discussed.
作者
李韵秋
李聪博
郑云
李天晓
吴晓光
洪锐
吴鸿毅
郑敏
赵子豪
贺子阳
李金泽
李广顺
郭成宇
倪磊
周振翔
贺创业
刘伏龙
周小红
柳敏良
张玉虎
王守宇
王硕
竺礼华
LI Yunqiu;LI Congbo;ZHENG Yun;LI Tianxiao;WU Xiaoguang;HONG Rui;WU Hongyi;ZHENG Min;ZHAO Zihao;HE Ziyang;LI Jinze;LI Guangshun;GUO Chengyu;NI Lei;ZHOU Zhenxiang;HE Chuangye;LIU Fulong;ZHOU Xiaohong;LIU Minliang;ZHANG Yuhu;WANG Shouyu;WANG Shuo;ZHU Lihua(China Institute of Atomic Energy,Beijing 102413,China;Department of Science,Xihua University,Chengdu 610039,China;Department of Physics,Jilin University,Changchun 130023,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;State Key Laboratory of Nuclear Physics and Technology,Department of Physics,Peking University,Beijing 100091,China;Department of Physics,Shandong University(Weihai),Weihai 264209,Shandong,China;Physical and Nuclear Energy and Engineering,Beihang University,Beijing 100191,China)
出处
《原子核物理评论》
CAS
CSCD
北大核心
2024年第1期250-255,共6页
Nuclear Physics Review
基金
国家自然科学基金资助项目(11975315,U1932209,U2167202,U2167201)
稳定支持基础科研计划资助。
关键词
高自旋态
在束谱学
原子核壳模型
high spin state
in-beamγ-ray spectroscopy
nuclear shell model
