^(178)Hf同核异能态激发与退激路径研究  

Study on the Excitation and Deexcitation Paths of ^(178)Hf Isomer

作　　者：贺子阳 吴晓光[1] 蒋伟 李聪博[1] 周振翔 孙琪 郭明伟 吴鸿毅 李智焕[4] 樊瑞睿[2,3] 唐靖宇 李天晓[1] 胡守扬 智宇 宋金兴[1] 李沛玉 栾广源 张奇玮 王朝辉 陈雄军[1] 胡世鹏[5] 钟健[5] 甘林[5] 张智程[5] 张苏雅拉吐[6] 王德鑫 孙保华 庞萱[7] 郑云[1] 李笑梅 阮锡超[1] 华辉[4] HE Ziyang;WU Xiaoguang;JIANG Wei;LI Congbo;ZHOU Zhenxiang;SUN Qi;GUO Mingwei;WU Hongyi;LI Zhihuan;FAN Ruirui;TANG Jingyu;LI Tianxiao;HU Shouyang;ZHI Yu;SONG Jinxing;LI Peiyu;LUAN Guangyuan;ZHANG Qiwei;WANG Zhaohui;CHEN Xiongjun;HU Shipeng;ZHONG Jian;GAN Lin;ZHANG Zhicheng;ZHANG Suyalatu;WANG Dexin;SUN Baohua;PANG Xuan;ZHENG Yun;LI Xiaomei;RUAN Xichao;HUA Hui(China Institute of Atomic Energy,Beijing 102413,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongwan 523803,Guangdong,China;School of Physics,Peking University,Beijing 100871,China;School of Physics and Optoelectronics,Shenzhen University,Shenzhen 518060,Guangdong,China;College of Physics and Electronic Information,Inner Mongolia University for Nationalities,Tongliao 028000,Inner Mongolia,China;School of Physics,Beihang University,Beijing 10019,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]中国科学院高能物理研究所,北京100049 [3]散裂中子源科学中心,广东东莞523803 [4]北京大学物理学院,北京100871 [5]深圳大学物理与光电工程学院,广东深圳518060 [6]内蒙古民族大学物理与电子信息学院,内蒙古通辽028000 [7]北京航空航天大学物理学院,北京100191

出　　处：《原子核物理评论》2024年第1期256-262,共7页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(U1932209,11975315,U2167202,U2167201)。

摘　　要：具有长寿命高激发态的同核异能素在国家战略安全和储能领域有重要的意义,其关键技术在于掌握人工诱发同核异能素快速退激到基态。近些年该项技术研究遇到了瓶颈,需从原子核结构研究的角度出发,通过对同核异能素的形成、受激激发和退激机制的深入研究,突破遇到的瓶颈,进而掌握诱发同核异能素快速退激到基态的关键技术。本工作是在实验技术方面利用白光中子束流轰击Hf靶,创新性地建立了由氟化钡探测器阵列GTAF-Ⅱ进行全能量测量与高纯锗探测器进行特征γ射线测量,再结合白光中子飞行时间测量组成的三重符合测量系统,通过对实验数据的分析发现了^(178)Hf同核异能态激发到过渡能级并快速释放的迹象。Isomer with long lifetime and high excitation energy is of great significance in the fields of national strategic security and energy storage.Mastering the method of inducing isomer to decay is the key technology.However,this technology has got into trouble in recent years.For mastering the method of inducing isomer to decay,it is beneficial to start the research on the formation,excitation and de-excitation mechanism of isomer from the view of atomic nucleus structure.In this work,we used a white light neutron beam to bombard the Hf target in terms of experimental technology,and innovatively established a triple coincidence measurement system consisting of a barium fluoride detector array GTAF-Ⅱfor full energy measurement,a high-purity germanium detector for characteristic γ-ray measurement,and a white light neutron time-of-flight measurement.Through the analysis of experimental data,we found the sign of the ^(178)Hf isomeric state exciting to the transition level and releasing rapidly.

关 键 词：^(178)Hf同核异能素 诱发衰变 核能释放 多探头多参数伽马谱符合测量装置 

分 类 号：O571.23[理学—粒子物理与原子核物理]