充气反冲核谱仪焦平面探测阵列的GEANT4模拟  

GEANT4 Simulation of the Focal Plane Detection Array of Gas-filled Recoil Separator

作　　者：温小江 张志远[2,3] 周厚兵 张明明[2] 李广顺 王建国 甘再国[2,3] 马龙[2] 黄明辉[2,3] 杨华彬 杨春莉[2,3] WEN Xiaojiang;ZHANG Zhiyuan;ZHOU Houbing;ZHANG Mingming;LI Guangshun;WANG Jianguo;GAN Zaiguo;MA Long;HUANG Minghui;YANG Huabin;YANG Chunli(Department of Physics,Guangxi Normal University,Guilin 541004,Guangxi,China;CAS Key Laboratory of High Precision Nuclear Spectroscopy,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;Guangxi Key Laboratory Breeding Base of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,Guangxi,China)

机构地区：[1]广西师范大学物理科学与技术学院,广西桂林541004 [2]中国科学院近代物理研究所高精度核谱学重点实验室,兰州730000 [3]中国科学院大学核科学与技术学院,北京100049 [4]广西核物理与核技术重点实验室,广西桂林541004

出　　处：《原子核物理评论》2021年第4期423-429,共7页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11975279,U1732270,11965003,11505035,11675266);国家重点研发计划项目(2018YFA0404402);中国科学院战略性先导科技专项(B类)(XDB34010000);广西自然科学基金资助项目(2017GXNSFAA198160,2017GXNSFGA198001);广西高等学校高水平创新团队及卓越学者计划资助。

摘　　要：充气反冲核谱仪(SHANS)是目前国内合成缺中子锕系新核素、研究重核素α衰变性质的重要实验装置。为进一步提高焦平面探测阵列对重核素α衰变粒子和射线的探测效率,计划对现有探测装置进行升级。本文的主要工作是采用基于蒙特卡罗方法的GEANT4软件对现有的谱仪探测器阵列进行模拟,并与实验测量数据进行比较,以验证程序的准确性。结果表明,新探测系统对α衰变粒子的探测效率可达到88%左右,对能量在1 MeV的γ射线全能峰的探测效率约为7%。The gas-filled recoil nuclear separator SHANS(Spectrometer for Heavy Atoms and Nuclear Structure) is an important experimental device for synthesing new neutron-deficient actinide nuclides and studying α decay properties of heavy nuclides in China. In order to further improve the detective efficiency of the focal plane detector array for heavy nuclide α decay particles and rays, we plan to upgrade the existing detection instrument. The main work of this paper is to simulate the existing detector array by using the GEANT4 software based on Monte Carlo method. In order to verify the accuracy of the program, the simulation was compared with the experimental data. The results show that the detective efficiency of the new detector system for α decay particles is about 88%,and the detective efficiency for rays with an energy of 1 MeV is about 7%.

关 键 词：充气反冲核谱仪 焦平面探测器 GEANT4模拟 探测效率 

分 类 号：O571.53[理学—粒子物理与原子核物理]