This paper presents the results of the fast neutron irradiation (E$_n$ > 0.5MeV) of an EJ-276 scintillator performed in the MARIA research reactor with fluence up to 5.3$\times$10$^{15}$ particles/cm$^2$. In our work, four samples with size $\phi$25.4~mm$\times$5~mm were tested. The changes in the light yield, emission and absorption spectrum and neutron/gamma discrimination using PuBe source before and after irradiation are presented. The figure of merit in neutron/gamma discrimination based on the charge integration method for different neutron fluences and different short gate integration times are determined.

中文翻译：

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EJ-276闪烁材料的中子硬度

本文介绍了在 MARIA 研究反应堆中对 EJ-276 闪烁体进行快中子辐照 (E$_n$ > 0.5MeV) 的结果，通量高达 5.3$\times$10$^{15}$ 粒子/cm$ ^2$。在我们的工作中，测试了大小为 $\phi$25.4~mm$\times$5~mm 的四个样本。介绍了辐照前后使用 PuBe 源的光产额、发射和吸收光谱以及中子/伽马辨别力的变化。针对不同的中子注量和不同的短栅极积分时间，确定了基于电荷积分方法的中子/伽马鉴别的品质因数。