摘要
基于半经验法扣除中子散射本底,提出了一种多球中子谱仪校准的新方法。首先用热中子参考辐射装置校准多球中子谱仪各中子球内He-3正比计数器的探测效率。用多球中子谱仪各中子球单独测量参考^(241)Am-Be中子源,结合半经验法扣除散射,给出了各中子球的注量响应。结合两者实验结果,获得^(241)Am-Be源能谱并给出谱仪注量响应。结果表明,校准的多球中子谱仪具备快中子区测量能力。
A new method for calibrating Bonner Sphere Spectrometer by using semi-empirical method to deduct neutron scattering background was proposed.The detection efficiency of the He-3 proportional counters in each neutron sphere of Bonner Sphere Spectrometer was calibrated by using a thermal neutron reference radiation device.The reference 241 Am-Be neutron source was measured separately by each neutron sphere of the Bonner Sphere Spectrometer,and the fluence response of each neutron sphere was given by using the semi-empirical method to deduct the scattering.Combining the results of two experiments,the energy spectrum of 241 Am-Be neutron field was obtained and the fluence calibration factor of the spectrometer was given.The results also verify the ability of calibrated Bonner Sphere Spectrometer to measure fast neutron field.
作者
孙博文
曾志
张辉
马豪
李君利
SUN Bowen;ZENG Zhi;ZHANG Hui;MA Hao;LI Junli(Department of Engineering Physics,Tsinghua University,Beijing 100084;Key Laboratory of Particle&Radiation Imaging(Tsinghua University),Ministry of Education,Beijing 100084)
出处
《辐射防护》
CAS
CSCD
北大核心
2024年第2期120-125,共6页
Radiation Protection
关键词
多球中子谱仪
校准
中子能谱
半经验法
Bonner Sphere Spectrometer
calibration
neutron energy spectrum
semi-empirical method
