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研究了由于电磁簇射在CsI(T1)晶体后端的泄漏而引起的硅光二极管“核计数器”效应.通过GEANT模拟和实验测量分析其在BESⅢ的CsI(T1)晶体量能器中对能量测量的影响.
The “nuclear counter” effect of silicon photodiode due to the leakage of electromagnetic shower at the back end of CsI (T1) crystal was studied. The influence of GEANT on energy measurement in BESIII CsI (T1) crystallizer was analyzed by GEANT simulation and experimental measurements.