关键词: 
GEANT4 /
CsI(Tl)闪烁探测器 /
位置分辨 /
反射系数

摘要: 介绍了一种双维位置灵敏CsI(Tl)闪烁探测器， 利用GEANT4对它进行了蒙特卡罗模拟， 得到了RIB 17N的位置分布谱及探测器的空间位置分辨，　模拟结果与实验测量值很好地吻合。给出了影响探测器分辨的主要因素及改进方案。A two dimensional position sensitive CsI(Tl) scintillation detector readout with PSPMT was introduced. The performance of detector was simulated by using Monte Carlo code GEANT4. The position spectrum of RIB 17N and the detector’s position resolution were obtained, and the simulation results accorded with the experimental ones. The main factors， which can affect performance of the detector, and some planned detector improvements were presented.