标题： 钆负载塑料闪烁体作为中子抑制器的特性分析 显示英文标题

标题： Characterization of Gadolinium-loaded Plastic Scintillator for Use as a Neutron Veto

摘要： 掺杂高中子俘获截面材料的闪烁体可以通过其产生的伽马射线来检测中子。 使用液体闪烁体的此类探测器已在高能物理实验中成功应用。 然而，液体闪烁体可能会泄漏，并且不如固体闪烁体易于制成模块化或复杂形状。 我们在实验室中合成了多种不同浓度的钆化合物基聚苯乙烯闪烁体。 测量了样品的光输出、发射光谱和衰减长度，并评估了使用波长位移（WLS）光纤的光收集策略。 测量的光学参数用于调整基于Geant4的光学蒙特卡洛模拟，从而计算出捕获效率。 这项技术也被评估为直接探测暗物质实验——超低温暗物质搜索（SuperCDMS）中可能的中子拒斥技术。 显示英文摘要

摘要： Scintillator doped with a high neutron-capture cross-section material can be used to detect neutrons via their resulting gamma rays. Examples of such detectors using liquid scintillator have been successfully used in high-energy physics experiments. However, a liquid scintillator can leak and is not as amenable to modular or complex shapes as a solid scintillator. Polystyrene-based scintillators from a variety of gadolinium compounds with varying concentrations were polymerized in our laboratory. The light output, emission spectra, and attenuation length of our samples were measured and light collection strategies using a wavelength shifting (WLS) fiber were evaluated. The measured optical parameters were used to tune a Geant4-based optical Monte Carlo, enabling the trapping efficiency to be calculated. This technology was also evaluated as a possible neutron veto for the direct detection dark matter experiment, Super Cryogenic Dark Matter Search (SuperCDMS).