中文摘要：

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0．44μs，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。

英文摘要：

Background： Capture-gated neutron detector has been doped by the higher thermal cross section elements, such as 6Li, μB or natGd, for a fast neutron incident detector signal with n-p recoil impulse and pulse neutron capture associated characteristics. Purpose： The aim is to study the double pulse waveform spectra and to analyze the n-p recoil impulse of the EJ339A capture-gated neutron detector. Methods： Through the analysis of energy spectra and the double pulse waveform spectra, the characteristics of EJ339A capture-gated detector are studied. Results： Capture-gated detector from the energy spectra and PSD spectra measurement is effective for neutron and gamma ray. The wave of digital technology could well analyze the n-p recoil impulse and give the τ value of the EJ339A in the experiment. Conclusion： EJ339A really has captrred-gated detector characteristics, pulse neutron capture and n-p associated characteristics of recoil impulse. The capture time of EJ339A is 0.44 μs, which is consistent with the theoretical calculation results.