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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.

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