Crystal growth and scintillation properties of carbazole for neutron detection
Crystal growth and scintillation properties of carbazole for neutron detection
复制标题
用于中子检测的咔唑晶体生长和闪烁特性
DOI：
10.1109/tns.2020.2996276
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发表时间：
2020
影响因子：
1.8
通讯作者：
Yuji Ohashi and Akira Yoshikawa
中科院分区：
文献类型：
--
作者：
Akihiro Yamaji;Shinnosuke Yamato;Shunsuke Kurosawa;Masao Yoshino;Satoshi Toyoda;Kei Kamada;Yuui Yokota;Hiroki Sato;Yuji Ohashi and Akira Yoshikawa
采用自籽晶垂直布里奇曼法生长了咔唑晶体，并对其闪烁性能进行了研究。粉末X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）分析结果表明，所生长的咔唑晶体为单相正交结构。进行了光致发光和放射性发光测量，两个发射峰的最大值均在420 nm处。在5.5 MeV α射线照射下的光产额估计比锂玻璃GS-20高1.87倍。中子辐照下的闪烁衰减时间为11.4 ± 0.3ns。从温度依赖性测量可以看出，在662 keV伽马射线激发下的光输出随着温度的升高而降低。
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.