近质子滴线核^(28)S的β延迟γ衰变研究  

β-delayedγDecay of the Nucleus ^(28)S Near the Proton Drip-line

作　　者：高祺锐 徐新星[2,3,4,5,6] 周小红 孙立杰[4,5,7] 梁鹏飞 刘嘉健 林承键[5,8] 李晓菁 李智焕 吴鸿毅[9] 杨彦云 王建松 王东玺[5] 蓝乙华 马朋[2] 段芳芳[2,11] 高志浩 胡强[2] 白真 马军兵[2] 王建国[2] 钟福鹏 武晨光 罗迪雯[9] 蒋颖[9] 刘洋[9] 侯东升[2,3] 李忍 马南茹 马维虎 石国柱 余功明 DPatel 金树亚 王煜峰[2,13] 余悦超[2,13] 周清武 王鹏[2,14] 胡力元 王翔 臧宏亮 李朋杰 朱浩钒 林喆阳 赵青青 杨磊 温培威 杨峰 贾会明 张高龙 潘敏 汪小雨 孙浩瀚[5] 胡正国 陈若富[2,3] 柳敏良[2,3] 杨维青[2] GAO Qirui;XU Xinxing;ZHOU Xiaohong;SUN Lijie;LIANG Pengfei;LIU Jiajian;LIN Chengjian;Jenny Lee;LI Zhihuan;WU Hongyi;YANG Yanyun;WANG Jiansong;WANG Dongxi;LAN Yihua;MA Peng;DUAN Fangfang;GAO Zhihao;HU Qiang;BAI Zhen;MA Junbing;WANG Jianguo;ZHONG Fupeng;WU Chenguang;LUO Diwen;JIANG Yin;LIU Yang;HOU Dongsheng;LI Ren;MA Nanru;MA Weihu;SHI Guozhu;YU Gongming;Patel Dipika;JIN Shuya;WANG Yufeng;YU Yuechao;ZHOU Qingwu;WANG Peng;HU Liyuan;WANG Xiang;ZANG Hongliang;LI Pengjie;ZHU Haofan;LIN Zheyang;ZHAO Qingqing;YANG Lei;WEN Peiwei;YANG Feng;JIA Huiming;ZHANG Gaolong;PAN Min;WANG Xiaoyu;SUN Haohan;HU Zhengguo;CHEN Ruofu;LIU Minliang;YANG Weiqing(Institute of Quantum Matter,South China Normal University,Guangzhou 510631,China;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;Department of Physics,University of Hong Kong,Hong Kong 999077,China;Department of Nuclear Physics,China Institute of Atomic Energy,Beijing 102413,China;Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516003,Guangdong,China;School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;College of Physics and Technology,Guangxi Normal University,Guilin 541004,Guangxi,China;School of Physics,Peking University,Beijing 100871,China;School of Science,Huzhou University,Huzhou 313000,Zhejiang,China;School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China;Institute of Modern Physics,Fudan University,Shanghai 200433,China;School of Physics and Astronomy,Yunnan University,Kunming 650091,China;School of Physical Science and Technology,Southwest University,Chongqing 400044,China;Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin Engineering University,Harbin 150001,China;School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China;School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]华南师范大学量子物质研究院,广州510631 [2]中国科学院近代物理研究所,兰州730000 [3]中国科学院大学核科学与技术学院,北京100049 [4]香港大学物理学系,中国香港999077 [5]中国原子能科学研究院核物理研究所,北京102413 [6]先进能源科学与技术广东省实验室,广东惠州516003 [7]上海交通大学物理与天文学院,上海200240 [8]广西师范大学物理科学与技术学院,广西桂林541004 [9]北京大学物理学院,北京100871 [10]湖州师范学院理学院,浙江湖州313000 [11]兰州大学核科学与技术学院,兰州730000 [12]复旦大学现代物理研究所,上海200433 [13]云南大学物理与天文学院,昆明650091 [14]西南大学物理科学与技术学院,重庆400044 [15]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,哈尔滨150001 [16]郑州大学物理学院(微电子学院),郑州450001 [17]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》2021年第2期117-122,共6页Nuclear Physics Review

基　　金：中国科学院战略性先导科技专项(B类)资助(XDB34000000);国家自然科学基金资助项目(12022501,U1932206,U1632136)。

摘　　要：在兰州重离子研究装置上,依托兰州放射性束流线,产生、分离和鉴别了同位旋第三分量TZ=−2的近质子滴线核^(28)S,并通过使用包括双面硅条探测器和高纯锗探测器在内的探测阵列,开展了^(28)S的β延迟γ衰变测量。实验准确测量了^(28)S衰变中的5条β延迟γ射线,得到了子核^(28)P相应能级的能量。首次提取出了β衰变布居到^(28)P低激发态的衰变分支比,并构筑了^(28)S的全新部分衰变纲图。本工作为将来进一步比较^(28)S和^(28)Mg间的镜像不对称性提供了精确的实验数据。The nucleus^(28)S(isospin projection TZ=−2)near the proton drip-line was produced,separated and purified by HIRFL-RIBLL1 facility and the measurement ofβ-delayedγdecay of^(28)S was performed using a detector array consisted of double-sided silicon detectors and Clover-type high purity germanium detectors.Fiveγtransitions fromβdecay of^(28)S were precisely measured and the corresponding energies of the states of daughter^(28)P were obtained.The branch ratios of low-lying states of^(28)P populated byβdecay were extracted for the first time and the new partial^(28)Sβ-decay scheme was deduced.This work provides accurate data for the further study of mirror asymmetry in^(28)S/^(28)Mg.

关 键 词：Β衰变 双面硅条探测器 γ射线谱 β衰变分支比 

分 类 号：O571.32[理学—粒子物理与原子核物理]