基于单球多计数器、GM计数管同时测量n、γ剂量当量的装置研制

摘要

介绍了一款同时测量混合辐射场中n、γ剂量当量的装置研制,该装置通过单球多计数器和GM计数管相结合的方法构成,单球多计数器的探测器由三根两两垂直的3He正比计数管构成,通过解谱的方法得到中子剂量当量.在Am-Be和Cf-252中子参考辐射场中进行了测试,剂量当量相对误差<30%;在能量范围为63keV-1.25MeV的入射光子下进行了能量响应试验,相对误差<30%.%This article describes a unit used for measuring the dose equivalent of neutron and gamma ray of the mixed radiation field at the same time,which is composed of single -sphere multi-detector neutron spectrome-ter and GM counting tube.The detector of single sphere with multi -counter is composed of three He -3 pro-portional counters which is orthogonal.It has been tested in the standard neutron radiation field of Cf -252 and Am-Be,the relative error of the dose equivalent is less than 30%.The measurement of energy response has been tested in the incident photon beam which's energy is between 1 MeV and 14 MeV, the relative error is less than 30%.