利用多普勒移动衰减法研究^(46)Ti核的激发态能级寿命  

Studies on the Lifetimes of^(46)Ti Excited States via the Doppler Shift Attenuation Method

作　　者：嘎达吉勒湖 谢萌冉 李健国 李广顺[1,2] Rohilla Aman 马鹏琮 曾凡斐 黄浩 郑鹏松 王建国 强赟华[1] 柳敏良[1] 郭松[1] 丁兵[1] 张文强[1] 方永得 周小红[1] 李天晓[4] 滑伟 程浩 GADA Jilehu;XIE Mengran;LI Jianguo;LI Guangshun;ROHILLA Aman;MA Pengcong;ZENG Fanfei;HUANG Hao;ZHENG Pengsong;WANG Jianguo;QIANG Yunhua;LIU Minliang;GUO Song;DING Bing;ZHANG Wenqiang;FANG Yongde;ZHOU Xiaohong;LI Tianxiao;HUA Wei;CHENG Hao(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;School of Space Science and Physics,Institute of Space Sciences,Shandong University,Weihai 264209,Shandong,China;China Institute of Atomic Energy,Beijing 102413,China;Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,Guangdong,China;School of Physics,Beihang University,Beijing 100191,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学核科学与技术学院,北京100049 [3]山东大学空间科学与物理学院,山东威海264209 [4]中国原子能科学研究院,北京100049 [5]中山大学中法核工程与技术学院,广东珠海519082 [6]北京航空航天大学物理学院,北京100191

出　　处：《原子核物理评论》2023年第2期193-197,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(12121005,U1932138);中国科学院战略性先导科技专项(B类)(XDB34010000)。

摘　　要：原子核的能级寿命直接反映了其内部的结构信息,是核性质研究中一个十分重要的物理参量。本工作报道了依托兰州重离子加速器装置,首次采取多普勒移动衰减法(DSAM)开展的原子核能级寿命测量。采取核反应^(12)C(^(36)Ar,2p)来布居46Ti的高激发态,利用新组建的大型高纯锗(HPGe)探测器阵列进行符合测量。根据γ能谱分别提取了4^(+)、5^(-)、6^(-)态的能级寿命,并得到了这些态的跃迁概率。理论上采取大规模组态混合壳模型进行计算,并得出了能级的组态信息。Lifetimes of nuclear excited states are related to its internal structure,and considered as one of most important values in the nuclear property studies.In this paper,we report the first lifetime measurements of nuclear excited states at the HIRFL facility via Doppler Shift Attenuation Method(DSAM).The excited states of^(46)Ti were populated by the 12^(C)(^(36)Ar,2p)reaction,and coincidence measurements were performed by the newly upgraded HPGe detector array.Lifetimes of 4^(+),5^(−),and 6^(−)states were extracted from the gated spectra,and corresponding transition probabilities were deduced.Further theoretical calculations have been performed using the large scale configuration-mixing shell model,and configurations of those states are suggested.

关 键 词：能级寿命 多普勒移动衰减法 壳模型计算 能级组态 

分 类 号：O571.53[理学—粒子物理与原子核物理]