NaI(TI)探测器晶体体积对主要性能影响研究  

Study on Spectral Response and Effective Center of NaI(TI) Detectors in Different Size

作　　者：古再奴尔.安尼瓦 艾尔肯.阿不列木[1] 甫尔开提.夏尔丁 GUZAINUR Anniwa AIERKEN Abuliemu FUERKAIYI Xiaerding(School of Physics Science and Technology Xinjiang University, Urumqi 830046, Chin)

机构地区：[1]新疆大学物理科学与技术学院,乌鲁木齐830046

出　　处：《核电子学与探测技术》2016年第11期1089-1093,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(10965007)资助

摘　　要：使用^(137)Cs、^(60)Co和^(22)Na三种点射线源,分别探讨了由不同体积闪烁晶体组成的探测器对不同能量γ射线的峰效率、能谱响应及有效中心的影响。实验结果表明:随着闪烁晶体体积的不同,不同能量γ能谱光电峰的峰位及其能量分辨率都发生了变化。还发现探测器有效中心点的位置依赖于闪烁晶体的体积,其峰效率的倒数与探测器有效距离平方成反比。此实验结果可为改善不同体积NaI(Tl)闪烁探测器的能谱响应和高精度测量提供参考。In this paper, we investigate the effects of scintillation detector in different sizes to the peak efficiency, energy spectrum response and effective center of 7 - rays in different energy using three types of point - ray sources 1377 Cs, 60 Co and 22Na. The experimental results show that peak position and energy resolution of photoe- leetrie peaks of γ energy spectra in different energy are changed by the different sizes of scintillating crystals. It is also found that the position of the effective center depends on the size of the scintillation crystal, The reciprocal of the peak efficiency is inversely proportional to the square of the effective distance of the detector. The experimental results can also provide references for improving energy spectrum response and high -precision measurement of scintillation detector NaI （T1） in different sizes.

关 键 词：NaI(T1)探测器 峰效率 能谱响应 有效中心 

分 类 号：O571.1[理学—粒子物理与原子核物理]