Characterization of cadmium capture-gated detector for nuclear nonproliferation applications

IEEE Nuclear Science Symposuim & Medical Imaging Conference Pub Date : 2010-10-01 DOI:10.1109/NSSMIC.2010.5873727

M. Flaska, S. Clarke, C. Lawrence, S. Pozzi, J. B. Czirr, L. Rees

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引用次数: 2

Abstract

Almost all commercially applied neutron-counting systems employ 3He tubes for detection of thermal neutrons. However, due to a large number of 3He systems deployed in the field, there is currently a severe shortage of 3He gas. Therefore, novel neutron detection systems are desirable, especially because a large number of detection systems are needed to meet current security demands. One class of detectors that has been explored is capture-gated scintillation detectors which consist of a standard scintillation detector (plastic or liquid) that has been modified to include a neutron capturing isotope. The capture-gated neutron-spectroscopy principle is based on the fact that a single neutron that interacts in a capture-gated detector can create two pulses that are related in time. In this work, we present simulation and measurement results for a cadmium/plastic-scintillator capture-gated detector. The detector consists of 13, 1-cm thick BC-408 plastic-scintillator layers and 12, 0.1-mm thick natCd layers. This detector possesses unique detection characteristics that could find use in nuclear nonproliferation applications.

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核不扩散用镉捕获门控探测器的表征

几乎所有商业上应用的中子计数系统都使用3He管来探测热中子。然而，由于现场部署了大量的3He系统，目前3He气严重短缺。因此，新型的中子探测系统是需要的，特别是因为需要大量的探测系统来满足当前的安全需求。一类已被探索的探测器是捕获门控闪烁探测器，它由一个标准闪烁探测器(塑料或液体)组成，该探测器已被修改为包括中子捕获同位素。捕获门控中子光谱学原理是基于这样一个事实，即在捕获门控探测器中相互作用的单个中子可以产生两个在时间上相关的脉冲。在这项工作中，我们提出了镉/塑料闪烁体捕获门控探测器的模拟和测量结果。该探测器由131cm厚的BC-408塑料闪烁体层和120.1 mm厚的natCd层组成。该探测器具有独特的探测特性，可用于核不扩散应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Nuclear Science Symposuim & Medical Imaging Conference

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