Luminescence and scintillation properties of Cs2ZnCl4 and Cs3ZnCl5
Luminescence and scintillation properties of Cs2ZnCl4 and Cs3ZnCl5
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DOI：
10.35848/1347-4065/ab9655
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发表时间：
2020-06
影响因子：
1.5
通讯作者：
Keisuke Takahashi;Miki Arai;M. Koshimizu;Y. Fujimoto;T. Yanagida;K. Asai
中科院分区：
文献类型：
--
作者：
Keisuke Takahashi;Miki Arai;M. Koshimizu;Y. Fujimoto;T. Yanagida;K. Asai
合成了基于Cs_2ZnCl_4和Cs_3ZnCl_5三元卤化物晶体的快闪烁材料。在X射线照射下，观察到Cs2ZnCl4在310 nm处的发射带，肩部在260和410 nm处，观察到Cs3ZnCl5在240、290和390 nm处的发射带。观察到的条带主要归因于无俄歇发光（AFL）。在时间闪烁配置文件中，闪烁衰减时间常数为1.7和1.1 ns的Cs2ZnCl4和Cs3ZnCl5，分别被发现。这些快成分归因于AFL，占总闪烁量的88%以上。根据脉冲高度谱，Cs2ZnCl 4和Cs3ZnCl 5的光产额分别估计为1280和440光子MeV−1。Cs2ZnCl 4的快成分的光产额略低于BaF 2的光产额，BaF 2是一种市售的表现出AFL的快闪烁体。
Fast scintillation materials based on the ternary halide crystals of Cs2ZnCl4 and Cs3ZnCl5 were synthesized. Under X-ray irradiation, an emission band at 310 nm with shoulders at 260 and 410 nm was observed for Cs2ZnCl4, and emission bands at 240, 290, and 390 nm were observed for Cs3ZnCl5. The observed bands were primarily attributable to Auger-free luminescence (AFL). In the temporal scintillation profiles, scintillation decay time constants of 1.7 and 1.1 ns were found for Cs2ZnCl4 and Cs3ZnCl5, respectively. These fast components are attributed to AFL and constituted greater than 88% of the total scintillation amount. On the basis of the pulse height spectra, the light yields of Cs2ZnCl4 and Cs3ZnCl5 were estimated to be 1280 and 440 photons MeV−1, respectively. The light yield of the fast component of Cs2ZnCl4 was slightly lower than that of BaF2, which is a commercially available fast scintillator exhibiting AFL.