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EJ339A俘获门控中子探测器双脉冲特性

Le CHANG,Longxiang LIU,Hongwei WANG,Chunwang MA,Xiguang CAO,Guoqiang ZHANG,Yingdu LIU

Nuclear Techniques（2015）

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Abstract
实验研究了俘获门控中子探测器EJ339A的双脉冲波形特性,利用波形采样器进行波形记录,分析双脉冲时间差和PSD (Pulse Shape Discrimination)脉冲形状甄别和脉冲幅度谱.实验测量了EJ339A探测器中子俘获时间约为0.44 us,同经验公式计算结果一致.数据分析表明,EJ339A俘获门控中子探测器对中子及伽玛射线的PSD甄别能力要弱于EJ301常规液闪探测器;通过分析PSD谱开窗后的中子和伽玛能谱,发现EJ339A能够分析n-p反冲脉冲和中子俘获脉冲的关联特性及入射中子能量信息,EJ339A探测器的中子探测效率和双脉冲测量效率较低.
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