In-beam gamma rays of CSNS Back-n characterized by black resonance filter
作者机构：Key Laboratory of Nuclear DataChina Institute of Atomic EnergyBeijing 102413China Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science CenterDongguan 523803China State Key Laboratory of Nuclear Physics and TechnologySchool of PhysicsPeking UniversityBeijing 100871China Institute of Modern PhysicsFudan UniversityShanghai 200433China State Key Laboratory of Particle Detection and ElectronicsUniversity of Science and Technology of ChinaHefei 230026China School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and ChemistryChina Academy of Engineering PhysicsMianyang 621900China Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei 230026China USTC Archaeometry LabUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and ElectronicsInstitute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Northwest Institute of Nuclear TechnologyXi’an 710024China University of Chinese Academy of SciencesBeijing 100049China School of Nuclear Science and TechnologyLanzhou UniversityLanzhou 730000China Institute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei 230027China
出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)
年 卷 期：2024年第35卷第10期
页 面：149-160页
核心收录：
学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程]
基 金：supported by the Youth Talent Program of China National Nuclear Corporation the Continuous-Support Basic Scientific Research Project(BJ010261223282) the National Natural Science Foundation of China(No.11790321) the Research and development project of China National Nuclear Corporation
主 题：In-beam gamma rays Back-n CeBr_(3)scintillator Black filter resonance technique
摘 要：The back-streaming white-neutron beamline(Back-n)of the China Spallation Neutron Source is an essential neutronresearch platform built for the study of nuclear data,neutron physics,and neutron *** types of cross-sectional neutron-reaction measurements have been performed at Back-n since early *** measurements have shown that a significant number of gamma rays can be transmitted to the experimental stations of Back-n along with the neutron *** gamma rays,commonly referred to as in-beam gamma rays,can induce a non-negligible experimental background in neutron-reaction *** the characteristics of in-beam gamma rays is important for understanding the experimental ***,measuring in-beam gamma rays is challenging because most gamma-ray detectors are sensitive to neutrons;thus,discriminating between neutron-induced signals and those from in-beam gamma rays is *** this study,we propose the use of the black resonance filter method and a CeBr_(3) scintillation detector to measure the characteristics of the in-beam gamma rays of *** types of black resonance filters,^(181)Ta,^(59)Co,^(nat)Ag,and^(nat)Cd,were used in this *** time-of-flight(TOF)technique was used to select the detector signals remaining in the absorption region of the TOF spectra,which were mainly induced by in-beam gamma *** energy distribution and flux of the in-beam gamma rays of Back-n were determined by analyzing the deposited energy spectra of the CeBr_(3) scintillation detector and using Monte Carlo *** on the results of this study,the background contributions from in-beam gamma rays in neutron-reaction measurements at Back-n can be reasonably evaluated,which is beneficial for enhancing both the experimental methodology and data analysis.
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