溴化镧／氯化镧电流型闪烁探测器性能研究

摘要

LaBr3 ∶Ce and LaCl3 ∶Ce which exhibit superior ability in detection of γ-rays have been studied extensively in recent years .The properties for both of the LaBr3 ∶Ce scintillation detector and the LaCl3 ∶Ce scintillation detector were studied .The relative sensitivities to incident γ-rays of different energy were obtained by calculation .The sensitivities of detectors to the 137 Cs and 60 Co sources were measured and the sensitivity ratio of γ-ray to neutron was inspected .The result shows that the LaBr3 ∶Ce and LaCl3 ∶Ce scintillation detectors with high sensitivities to γ-rays and good γ/n discrimination are very appropriate for measurement in the mixed field by neutrons and γ-rays .%掺铈溴化镧（LaBr3∶Ce）及掺铈氯化镧（LaCl3∶Ce）是近年来出现的性能优良的新型无机闪烁体。本文对LaBr3∶Ce和LaCl3∶Ce电流型闪烁探测器的性能进行了研究，计算了探测器的相对灵敏度随入射γ射线能量的变化曲线，测定了其对137 Cs和60 Co的灵敏度，并检验了其γ/n分辨本领。结果表明，溴化镧和氯化镧探测器具有较高的γ灵敏度响应和γ/n分辨，适于测量低强度快脉冲中子、γ混合场中的γ射线束。