论文标题
使用标记的中子来测量有机闪烁体内在脉冲歧视的技术
Technique for the measurement of intrinsic pulse-shape discrimination for organic scintillators using tagged neutrons
论文作者
论文摘要
已经使用基于飞行时间的中子诱人技术和波形数字化在事件的基础上，对有机液体闪烁体NE 213A和EJ 305进行了快速中性/伽马射线脉冲歧视。使用伽马射线源和基于GEANT4的仿真来校准闪烁光的产量。通过整合数字化波形的选定部分以产生用于中子/伽马射线分离的脉冲部分，分析了中子和伽马射线事件的脉冲形状差异。该图的映射是根据检测器阈值的函数，也是由飞行时间确定的中子能量的函数。它清楚地表明，NE 213A的脉冲形状歧视能力优于EJ 305的脉冲歧视能力。中子诱人的技术提供的额外信息导致对这些有机闪烁体的脉搏形状歧视能力的评估更加详细。
Fast-neutron/gamma-ray pulse-shape discrimination has been performed for the organic liquid scintillators NE 213A and EJ 305 using a time-of-flight based neutron-tagging technique and waveform digitization on an event-by-event basis. Gamma-ray sources and a Geant4-based simulation were used to calibrate the scintillation-light yield. The difference in pulse shape for the neutron and gamma-ray events was analysed by integrating selected portions of the digitized waveform to produce a figure-of-merit for neutron/gamma-ray separation. This figure-of-merit has been mapped as a function of detector threshold and also of neutron energy determined from time-of-flight. It shows clearly that the well-established pulse-shape discrimination capabilities of NE 213A are superior to those of EJ 305. The extra information provided by the neutron-tagging technique has resulted in a far more detailed assessment of the pulse-shape discrimination capabilities of these organic scintillators.
