标题： LaBr3:Ce探测器中的快中子诱发本底 显示英文标题

标题： Fast-neutron induced background in LaBr3:Ce detectors

摘要： 闪烁探测器中带有1.5英寸LaBr3:Ce晶体的响应已在En = 2-12 MeV的能量范围内测量。 中子是由Ep = 5-14.6 MeV的Li靶通过脉冲质子束轰击产生的。 利用靶与探测器之间的飞行时间信息，在4个不同的中子能量下获得了LaBr3:Ce探测器的快中子相互作用产生的能量谱。 LaBr3:Ce晶体发射的中子诱发γ射线也在最低质子束能量下用附近的Ge探测器进行了测量。 此外，我们获得了大体积高纯度Ge探测器和NE-213液体闪烁探测器的数据，这两个探测器在实验中都作为监测探测器使用。 对液体闪烁体、Ge晶体和LaBr3:Ce晶体中的中子相互作用进行了蒙特卡罗类型的模拟，并与测量数据进行了比较。 由于数据吻合良好，我们提出了模拟结果以预测LaBr3:Ce探测器在晶体尺寸范围内的响应，其中子辐照能量范围为En = 0.5-10 MeV。 显示英文摘要

摘要： The response of a scintillation detector with a cylindrical 1.5-inch LaBr3:Ce crystal to incident neutrons has been measured in the energy range En = 2-12 MeV. Neutrons were produced by proton irradiation of a Li target at Ep = 5-14.6 MeV with pulsed proton beams. Using the time-of-flight information between target and detector, energy spectra of the LaBr3:Ce detector resulting from fast neutron interactions have been obtained at 4 different neutron energies. Neutron-induced gamma rays emitted by the LaBr3:Ce crystal were also measured in a nearby Ge detector at the lowest proton beam energy. In addition, we obtained data for neutron irradiation of a large-volume high-purity Ge detector and of a NE-213 liquid scintillator detector, both serving as monitor detectors in the experiment. Monte-Carlo type simulations for neutron interactions in the liquid scintillator, the Ge and LaBr3:Ce crystals have been performed and compared with measured data. Good agreement being obtained with the data, we present the results of simulations to predict the response of LaBr3:Ce detectors for a range of crystal sizes to neutron irradiation in the energy range En = 0.5-10 MeV