Abstract In this study, we propose an original approach for particle discrimination in a mixed radiation field using scintillators. The method relies on the possibility to identify the point of interaction in a phoswich detector from the emission spectra of the produced scintillation light, using optical filters as passive selectors. As a proof of concept, we developed a compact prototype thermal neutron active dosimeter for mixed neutron/gamma fields. The detector was characterized in terms of energy calibration, neutron efficiency and gamma rejection. The obtained results show that more than the 99% of counts due to gamma rays are rejected if the color discrimination is employed, thus demonstrating the feasibility of the proposed approach to be used in radiation detection.

中文翻译：

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使用无机闪烁体开发一种新的基于光学的准数字粒子鉴别技术

摘要 在这项研究中，我们提出了一种使用闪烁体在混合辐射场中区分粒子的原始方法。该方法依赖于从产生的闪烁光的发射光谱中识别 phoswich 检测器中相互作用点的可能性，使用滤光片作为无源选择器。作为概念验证，我们开发了一种用于混合中子/伽马场的紧凑型原型热中子活性剂量计。该探测器的特点是能量校准、中子效率和伽马抑制。获得的结果表明，如果采用颜色区分，则超过 99% 的伽马射线计数被拒绝，从而证明了所提出的方法用于辐射检测的可行性。