近球形核^(94)Nb的高自旋态研究  

High-spin States in near Stable Nucleus ^(94)Nb

作　　者：李韵秋 李聪博[1] 郑云[1] 李天晓 吴晓光[1] 洪锐 吴鸿毅 郑敏 赵子豪 贺子阳 李金泽 李广顺[4] 郭成宇 倪磊 周振翔 贺创业[1] 刘伏龙 周小红[4] 柳敏良[4] 张玉虎[4] 王守宇 王硕 竺礼华[7] 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)

机构地区：[1]中国原子能科学研究院,北京102413 [2]西华大学理学院,成都610039 [3]吉林大学物理学院,长春130023 [4]中国科学院近代物理研究所,兰州730000 [5]北京大学物理学院和核物理与核技术国家重点实验室,北京100091 [6]山东大学(威海)物理学院,山东威海264209 [7]北京航空航天大学物理科学与核能工程学院,北京100191

出　　处：《原子核物理评论》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。

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.

关 键 词：高自旋态 在束谱学 原子核壳模型 

分 类 号：O571.23[理学—粒子物理与原子核物理]