β衰变实验中电子对γ全吸收谱的影响  

The Influence of Electrons on the γ Total Absorption Spectrum inβDecay Experiments

作　　者：华雷明 卢飞 苏俊 谌阳平 金仕纶[6] 杨国春 李志宏[5] 郭冰[5] 刘龙祥 曹喜光 HUA Leiming;LU Fei;SU Jun;SHEN Yangping;JIN Shilun;YANG Guochun;LI Zhihong;GUO Bing;LIU Longxiang;CAO Xiguang(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China;China Institute of Atomic Energy,Beijing 102413,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049 [3]中国科学院上海高等研究院,上海201210 [4]北京师范大学核科学与技术学院射线束技术教育部重点实验室,北京100875 [5]中国原子能科学研究院,北京102413 [6]中国科学院近代物理研究所,兰州730000

出　　处：《原子核物理评论》2024年第1期467-472,共6页Nuclear Physics Review

基　　金：中国科学院战略性先导科技专项(B类)(XDB34030000);国家重点研发计划项目(2022YFA162301,2016YFA0400502,2023YFA1606701);国家自然科学基金资助项目(U1867211,11490563,12005304,12125509,11961141003,12222514)。

摘　　要：β-奥斯陆方法为研究高激发态下的放射性核素性质以及探究从铁到铀的元素核合成过程提供了一种重要的研究工具。本工作提出了一种新型数据处理技术,旨在消除β衰变电子对β-奥斯陆实验中的子核γ退激衰变探测的影响,从而准确地展开观测到的γ射线光谱。通过运用γ射线与衰变电子的综合探测器响应函数矩阵,将列主元消去法与逐步迭代反解法相结合,确定真实的入射γ光谱。通过模拟和反演计算,证实了所提出方法的可靠性与有效性。The β-Oslo experimental method provides an important investigative tool for examining the properties of radioactive nuclides in highly excited states and exploring the nucleosynthesis process for elements ranging from iron to uranium.This paper introduces a novel data processing technique designed to eliminate the impact of β-decay electrons on the detection of nuclear γde-excitation within β-Oslo experiments,accurately unfolding the observed γ-ray spectra.Utilizing a comprehensive detector response function matrix forγrays and decay electrons,this method combines column-pivotal elimination and iterative step-by-step inverse solution approaches to determine the true incident γ spectrum.The reliability and validity of the proposed method have been substantiated through extensive simulations and inverse calculations.

关 键 词：BGO探测器 β-奥斯陆方法 Geant4模拟 响应函数 列主元消去法 

分 类 号：O571.53[理学—粒子物理与原子核物理]