| TMSR白光中子源能量分辨率函数的模拟研究 |
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| 引用本文： | 姜炳,王小鹤,韩建龙,胡继峰,陈金根,蔡翔舟.TMSR白光中子源能量分辨率函数的模拟研究[J].原子能科学技术,2021,55(8):1508-1515. |
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| 作者姓名： | 姜炳 王小鹤 韩建龙 胡继峰 陈金根 蔡翔舟 |
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| 作者单位： | 中国科学院 上海应用物理研究所，上海201800；中国科学院 先进核能创新研究院，上海201800；中国科学院大学，北京100049 |
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| 摘 要： | 白光中子源及飞行时间谱仪的能量分辨率函数描述了谱仪装置测量中子能量的分辨率与所测中子的能量之间的函数关系。能量分辨率函数用于中子共振截面测量实验数据分析，对确定共振峰参数至关重要。本工作利用Geant4蒙特卡罗工具包构建了TMSR白光中子源的中子产生靶系统模型，模拟了中子在靶系统内由产生到溢出靶系统的整个物理过程，获得了不同能群中子从产生到溢出的时间分布。基于RPI能量分辨率函数形式，对时间分布进行拟合分析，获得了一套合适的参数，用于确定TMSR白光中子源飞行时间谱仪的中子能量分辨率函数。
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| 关 键 词： | TMSR白光中子源 中子靶系统 Geant4模拟 能量分辨率函数 |
Simulation Study on Energy Resolution Function of TMSR Photo-neutron Source |
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| JIANG Bing,WANG Xiaohe,HAN Jianlong,HU Jifeng,CHEN Jingen,CAI Xiangzhou.Simulation Study on Energy Resolution Function of TMSR Photo-neutron Source[J].Atomic Energy Science and Technology,2021,55(8):1508-1515. |
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| Authors: | JIANG Bing WANG Xiaohe HAN Jianlong HU Jifeng CHEN Jingen CAI Xiangzhou |
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| Affiliation: | Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;Innovative Academies in TMSR Energy System, Chinese Academy of Sciences, Shanghai 201800, China;University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The precise and accurate knowledge of energy resolution function of photo-neutron source is mandatory for the experiment broadening of resonance cross section data and the determination of resonance parameters. The target system model of the TMSR photo neutron source (TMSR-PNS) was built in the framework of Geant4 Monte Carlo toolkit, and used to simulate the process of generation and transportation of neutrons in the target system in order to obtain the neutron TOF (time of flight) distribution. The RPI energy resolution function was used to fit and analyze the time distribution of the moderated neutrons of the TMSR PNS. A set of parameters were obtained for determining the energy resolution function of the TMSR PNS. |
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| Keywords: | TMSR photo-neutron source neutron target assembly Geant4 simulation energy resolution function |
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