论文标题
纯CSI晶体中的脉冲形状歧视的能量中子鉴定
Energetic neutron identification with pulse shape discrimination in pure CsI crystals
论文作者
论文摘要
研究了用纯CSI闪烁体的脉冲形状歧视，作为一种在粒子物理实验中通过能量中子和光子分离能量沉积的方法。使用在欧洲XFEL XS1梁窗口附近收集的中子数据，研究了纯CSI的脉冲辨别能力，并使用近相同的检测器设置与CSI（TL）进行了比较，这些探测器设置并联。观察到相对于来自宇宙muons的能量沉积，观察到100mev中子的非弹性相互作用在纯CSI中产生较慢的闪烁发射。通过采用一种脉冲形状表征的电荷比率方法，与纯CSI的脉冲形状歧视可有效地识别中子与宇宙MUON的能量沉积物，但是，纯CSI无法像与CSI（TL）那样解决特定类型的中子非弹性相互作用。使用脉冲形状歧视，纯CSI检测器中的能量中子相互作用的速率是作为时间的函数测量的，并与欧洲XFEL束功率相关。结果表明，在将来的粒子物理实验中，用纯CSI使用纯CSI脉冲歧视具有改善电磁与Hadronic淋浴识别的重要潜力。
Pulse shape discrimination with pure CsI scintillators is investigated as a method for separating energy deposits by energetic neutrons and photons at particle physics experiments. Using neutron data collected near the European XFEL XS1 beam window the pulse shape discrimination capabilities of pure CsI are studied and compared to CsI(Tl) using near-identical detector setups, which were operated in parallel. The inelastic interactions of 100MeV neutrons are observed to produce a slower scintillation emission in pure CsI relative to energy deposits from cosmic muons. By employing a charge-ratio method for pulse shape characterization, pulse shape discrimination with pure CsI is shown to be effective for identifying energy deposits from neutrons vs. cosmic muons, however, pure CsI was not able resolve the specific type of neutron inelastic interactions as can be done with CsI(Tl). Using pulse shape discrimination, the rate of energetic neutron interactions in a pure CsI detector is measured as a function of time and shown to be correlated with the European XFEL beam power. The results demonstrate that pulse shape discrimination with pure CsI has significant potential to improve electromagnetic vs. hadronic shower identification at future particle physics experiments.
