摘要
利用Compton散射截面Klein-Nishina公式和Monte-Carlo粒子输运(MCNP)程序研究NaI(Tl)闪烁探测器单能γ能谱的Compton坪台.通过考虑光子在探头闪烁晶体中的次级效应及探测器的能谱展宽等因素,MCNP程序模拟所得NaI(Tl)探测器单能γ能谱的Compton坪台与实验能谱符合较好,并解释了理论曲线与实验曲线存在差异的原因.
Compton plateau in the 137Csγ -ray spectrum measured by a NaI（Tl） detector was Studied via the Klein-Nishina formula of Compton scattering differential cross section, which is deduced from the Dirac formula of quantum mechanics, and the MCNP simulation program also. There is distinct difference between the theoretical calculation and the experimental result, which is found to come from both the photon secondary effect in the scintillation crystal and the spectrum widening. By correction of these two effects, the MCNP simulation result is in very good agreement with the experimental data.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2013年第5期926-928,共3页
Journal of Jilin University:Science Edition
基金
国家自然科学基金(批准号:J1103202)
作者简介
张为天（1987-），男，汉族，硕士研究生，从事核技术的研究，E—mail：zhang19870630@163．com．
通信作者：杨东（1981-），男，汉族，博士，讲师，从事原子核结构和核数据评价的研究，E-mail：dyang@jlu．edu．cn．
