论文标题
水基闪烁体中的脉冲歧视
Pulse-shape discrimination in water-based scintillators
论文作者
论文摘要
这项工作描述了一类液体闪烁体，其中大部分是水（> 50 wt。％的整个组合物），并且可以区分中子和伽马射线引起的相互作用。通过平衡配方组件之间的界面相互作用，这些闪烁体形成可以在热力学上稳定的乳液。这种方法考虑了一种称为亲水性脂肪差异的数量，需要考虑盐度和温度以及表面活性剂和油相的表征。首先对由水和各种油组成的乳液进行表征。然后，考虑了闪烁的染料在石油相中的影响，然后考虑建造乳液的部分相图。对于具有单相的透明水中乳液，测量了闪烁的光产率和脉搏歧视的特性。表现最佳的闪烁体包含33 wt。闪烁的油相的百分比，显示出不含水的市售液体闪烁体的光产量的18％（EJ-309）。这些水性液体闪烁体在大约1500 Kevee时表现出了中子/伽马射线歧视的优点高达1.79。
This work describes a class of liquid scintillators that contain mostly water (>50 wt. % of the entire composition) and can discriminate between interactions induced by neutrons and gamma rays. By balancing the interface interactions between the components of the formulation, these scintillators form emulsions that can be thermodynamically stable. This approach, which considers a quantity known as the hydrophilic-lipophilic difference, requires consideration of the salinity and temperature as well as characterization of the surfactants and oil phase. Emulsions comprised of water and various oils were characterized first. Then, the effect of scintillating dyes in the oil phase was considered, followed by the construction of partial phase diagrams of the emulsions. For transparent oil-in-water emulsions with a single phase, the scintillation light yield and properties of pulse-shape discrimination were measured. The best performing scintillators contained 33 wt. % of a scintillating oil phase and exhibited a light yield that was as high as 18% of the light yield of a commercially available liquid scintillator that does not contain water (EJ-309). These water-based liquid scintillators exhibited a figure of merit of neutron/gamma ray discrimination as high as 1.79 at about 1500 keVee.
