基于固体径迹探测的中子个人剂量计性能研究

A performance study of a new personal neutron dosimeter based on SSNTD

CR-39固体径迹探测器作为一款被动式的中子个人剂量计,具有方便携带、价格低廉、抗干扰能力强、对γ、β射线不敏感、对快中子响应好等优点。针对新开发的一款中子个人剂量计,根据国际标准ISO 21909-1,对新型中子个人剂量计的CR-39固体径迹探测单元的相关性能开展了实验研究。实验结果表明,CR-39固体径迹探测器具备良好的测读重复性、批次均匀性、剂量线性、稳定性、参考辐射场响应以及对光子不敏感的属性,同时给出了CR-39测量中子剂量的剂量探测下限和不确定度,为国际标准引进提供了实验数据参考。

As a passive personal neutron dosimeter,CR-39 solid state nuclear track detector is convenient,cheap,insensitive to gamma and beta rays and has strong anti-interference ability,and better response to fast neutrons.A new personal neutron dosimeter has been developed combining with two measurement methods of CR-39 and albedo thermoluminescence dosimeter.Performance experiments are carried out on the CR-39 detector according to the international standard ISO 21909-1.The results show that the CR-39 solid state nuclear track detector has good repeatability,batch homogeneity,dose linearity,stability,response of reference radiation field and no photon-sensitivity.The detection threshold and uncertainty of dose measurement are presented in this paper.It provides an experimental data reference for the introduction of international standard.