上海激光电子伽马源的伽马活化实验平台建设  

Construction of Gamma Activation Experimental Platform for Shanghai Laser Electron Gamma Source

作　　者：杨宇萱 张岳 赵维娟[1] 王宏伟[2,3,4] 范功涛 许杭华[3] 刘龙祥 郝子锐 李志才 金晟 陈开杰 焦普 周梦蝶 王振伟 YANG Yuxuan;ZHANG Yue;ZHAO Weijuan;WANG Hongwei;FAN Gongtao;XU Hanghua;LIU Longxiang;HAO Zirui;LI Zhicai;JIN Sheng;CHEN Kaijie;JIAO Pu;ZHOU Mengdie;WANG Zhenwei(School of Physics,Zhengzhou University,Zhengzhou 450001,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China;University of Chinese Academy of Science,Beijing 100080,China;School of Nuclear Science and Technology,University of South China,Hengyang 421001,Hunan,China;School of Physics Science and Technology,ShanghaiTech University,Shanghai 201210,China;School of Physics,Henan Normal University,Xinxiang 453007,Henan,China)

机构地区：[1]郑州大学物理学院,郑州450001 [2]中国科学院上海应用物理研究所,上海201800 [3]中国科学院上海高等研究院,上海201210 [4]中国科学院大学,北京100080 [5]南华大学核科学与技术学院,湖南衡阳421001 [6]上海科技大学物质科学与技术学院,上海201210 [7]河南师范大学物理学院,河南新乡453007

出　　处：《原子核物理评论》2024年第1期433-438,共6页Nuclear Physics Review

基　　金：国家重点研发计划项目(2022YFA1602404);国家自然科学基金资助项目(12275338,12005280);核数据重点实验室基金项目(JCKY2022201C152);中国科学院国际人才计划访问学者项目(2021VMA0025)。

摘　　要：上海激光电子伽马源(Shanghai Laser Electron Gamma Source,SLEGS)通过激光与电子逆康普顿散射产生准单能、能量连续可调的兆电子伏伽马束,是目前国际上唯一一台可连续变换碰撞角度的激光康普顿散射(Laser Compton Scattering,LCS)伽马源装置。伽马活化是研究材料特性的有效手段之一,本文介绍了上海激光电子伽马源的伽马活化平台情况:包括在线活化过程、离线低本底测量、高纯锗(High Purity Germanium,HPGe)探测器的能量效率刻度等。目前的低本底屏蔽使得测量系统本底计数率降低到约5.2 cps(60 keV~3 MeV能区)。SLEGS的活化平台为开展伽马活化测量研究提供了有利条件,未来在核物理、核天体物理、医学应用、材料科学和环境科学等领域的研究将会发挥重要的作用。Shanghai Laser Electron Gamma Source(SLEGS)is a quasi-monoenergetic,and energy-tunable MeV gamma-rays source generated by the inverse Laser Compton Scattering(LCS)of lasers and electrons.SLEGS is the only LCS gamma source in the world with a continuously variable collision angular range.The gamma activation analysis is one of the effective methods to study the properties of materials.This paper introduces the gamma activation platform of SLEGS,including the online activation experiment,the low background offline measurement,and the energy and efficiency calibration for the high purity germanium(HPGe)detector.The counting rate of the shielded HPGe has been controlled down to 5.2 cps/s within 60 keV~3 MeV region under the current low background environment.The activation platform of the SLEGS has provided favorable conditions for gamma activation measurements,which will play an important role in future research in the fields of nuclear physics,nuclear astrophysics,medical applications,materials science,and environmental science.

关 键 词：伽马源 伽马活化 低本底测量 SLEGS 

分 类 号：O571.1[理学—粒子物理与原子核物理] O571.424[理学—物理]