Abstract

The results of modeling and optimization of a composite scintillator for recording thermal neutrons are presented. The interaction of thermal neutrons and γ-quanta with composites consisting of fragments of a glass scintillator containing ⁶Li was observed. The aim of the research was to determine the structure of a composite with high sensitivity to thermal neutrons and to provide effective suppression of signals from γ‑quanta. During the simulation, the optimal structural parameters of the composite were determined, such as the size of the fragments and the concentration of glass. According to the presented simulation results, optimized composites under thermal neutron irradiation can provide a neutron detection efficiency of at least 50% with a sensitivity to γ-quanta at the level η < 10^–6.

中文翻译：

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用于热中子记录的多相闪烁体结构优化

摘要

介绍了用于记录热中子的复合闪烁体的建模和优化结果。观察到热中子和 γ 量子与复合材料的相互作用，该复合材料由含有⁶ Li的玻璃闪烁体碎片组成。研究的目的是确定对热中子具有高灵敏度的复合材料的结构，并有效抑制来自 γ 量子的信号。在模拟过程中，确定了复合材料的最佳结构参数，例如碎片的大小和玻璃的浓度。根据所提供的模拟结果，在热中子辐照下优化的复合材料可以提供至少 50% 的中子探测效率，并且对 η 量子的灵敏度在 η < 10 ^–6水平.