Carbazole crystals were grown using self-seeding vertical Bridgman technique, and the scintillation properties for neutron detection were investigated. Results of powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated the single phase of the grown carbazole crystal with orthorhombic structure. Photo- and radio-luminescence measurements were carried out, and maxima of both emission peaks were at 420 nm. The light yield under 5.5-MeV alpha-ray irradiation was estimated to be 1.87 times higher than that of lithium glass GS-20. The scintillation decay time under neutron irradiation was estimated to be 11.4 ± 0.3 ns. It follows from the temperature dependence measurements that the light output under 662-keV gamma-ray excitation decreases with increasing temperature.

中文翻译：

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用于中子探测的咔唑晶体生长和闪烁特性

咔唑晶体使用自晶种垂直布里奇曼技术生长，并研究了中子检测的闪烁特性。粉末 X 射线衍射 (XRD) 和傅里叶变换红外光谱 (FTIR) 分析的结果表明生长的咔唑晶体为单相正交结构。进行了光致发光和辐射发光测量，两个发射峰的最大值都在 420 nm。在 5.5-MeV α 射线照射下的光产额估计是锂玻璃 GS-20 的 1.87 倍。中子辐照下的闪烁衰减时间估计为 11.4 ± 0.3 ns。根据温度相关性测量，662 keV 伽马射线激发下的光输出随温度升高而降低。