Simulation and test of the SLEGS TOF spectrometer at SSRF  

作　　者：Kai-Jie Chen Long-Xiang Liu Zi-Rui Hao Yu-Gang Ma Hong-Wei Wang Gong-Tao Fan Xi-Guang Cao Hang-Hua Xu Yi-Fei Niu Xin-Xiang Li Xin-Rong Hu Yu-Xuan Yang Sheng Jin Pan Kuang 

机构地区：[1]School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China [2]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [3]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China [4]University of Chinese Academy of Science,Beijing 100080,China [5]Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China [6]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [7]School of Nuclear Science and Technology,University of South China,Hengyang 421001,China [8]School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,China

出　　处：《Nuclear Science and Techniques》2023年第3期171-184,共14页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos.12275338,12005280,11905274 and 11875311);the Key Laboratory of Nuclear Data foundation (JCKY2022201C152);National key research and development program (No.2022YFA1602404);the Strategic Priority Research Program of the CAS (No.XDB34030000).

摘　　要：The Shanghai laser electron gamma source(SLEGS)is a powerful tool for exploring photonuclear physics,such as giant dipole resonance(GDR)and pygmy dipole resonance,which are the main mechanisms of collective nuclear motion.The goal of the SLEGS neutron time-of-flight(TOF)spectrometer is to measure GDR and specific nuclear structures in the energy region above the neutron threshold.The SLEGS TOF spectrometer was designed to hold 20 sets of EJ301 and LaBr3 detectors.Geant4 was used to simulate the efficiency of each detector and the entire spectrometer,which provides a reference for the selection of detectors and layout of the SLEGS TOF spectrometer.Under the events of 208Pb,implementations of coincidence and time-of-flight technology for complex experiments are available;thus,and neutron decay events can be separated.The performance of SLEGS TOF spectrometer was systematically evaluated using offline experiments,in which the time resolution reached approximately 0.9 ns.

关 键 词：SLEGS TIME-OF-FLIGHT Photoneutron nuclear reaction 

分 类 号：O433[机械工程—光学工程]