The large-scale modular BGO detection array(LAMBDA)design and test  

作　　者：Yao-De Sheng Lu-Yang Song Jun Su Shi-Lun Jin Fei Lu Yang-Ping Shen Jun-Feng Chen Li-Yong Zhang Jian-Jun He Xin-Yue Li Hong-Na Liu Feng-Shou Zhang Meng-Lin Qiu Shen Lin Hao Zhang Luo-Huan Wang Zi-Ming Li Yin-Ji Chen Xin-Zhi Jiang Xin Chen Zhi-Lin Shen Feng-Cheng Liu Zhi-Wei Qin Lin Wang Yi-Tong Huang Xiang Li Si-Ze Chen You-Bao Wang Zhi-Hong Li Bing Guo Wei-Ping Liu 

机构地区：[1]Key Laboratory of Beam Technology of Ministry of Education,School of Physics and Astronomy,Beijing Normal University,Beijing 100875,China [2]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China [4]China Institute of Atomic Energy,P.O.Box 275(10),Beijing 102413,China [5]Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201800,China [6]Key Laboratory of Nuclear Physics and Ion‑Beam Application(MoE),Institute of Modern Physics,Fudan University,200433 Shanghai,China [7]School of Mathematics and Physics,Handan University,Handan 056005,China [8]Institute of Nuclear Energy Safety Technology,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [9]Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Nuclear Science and Techniques》2024年第11期228-236,共9页核技术（英文）

基　　金：supported by the National Key R&D Program of China (Nos. 2022YFA1603300, 2018YFA0404401, 2023YFA1606701, and 2022YFA1602301);National Natural Science Foundation of China (Nos. U1867211, 12275026, and 12222514);the CAS Light of West China Program (No. 2020-82)

摘　　要：Total absorption gamma-ray spectroscopy(TAGS)is a powerful tool for measuring complexγ transitions,which has been effectively applied to the study of reactor decay heat.This paper presents the design of a new TAGS detector,the large-scale modular BGO detection array(LAMBDA),tailored for measuringβ-decay intensity distributions of fission products.The modular design allows the LAMBDA detectors to be assembled in various configurations.The final version of LAMBDA consists of 102 identical 60 mm×60 mm×120 mm BGO crystals and exhibits a high full-energy peak efficiency exceeding 80%at 0.5∼8 MeV based on a Monte Carlo simulation.Currently,approximately half of the LAMBDA modules have been manufactured.Tests usingγ-ray sources and nuclear reactions demonstrated favorable energy resolution,energy linearity,and efficiency uniformity across the modules.Forty-eight modules have been integrated into the prototype LAMBDA-I.The capability of LAMBDA-I inβ-delayedγ-decay experiments was evaluated by commissioning measurements using the ^(152)Eu source.

关 键 词：Total absorption gamma-ray spectroscopy Reactor decay heat BETA-DECAY BGO detector array LAMBDA 

分 类 号：TL329[核科学技术—核技术及应用]