Luminescence and scintillation properties of (C6H5(CH2)2NH3)2(Ba,Pb)Br4 with self-organized bi-dimensional quantum-well structures
Luminescence and scintillation properties of (C6H5(CH2)2NH3)2(Ba,Pb)Br4 with self-organized bi-dimensional quantum-well structures
复制标题
DOI：
10.7567/1347-4065/ab515d
复制
发表时间：
2019-12
影响因子：
1.5
通讯作者：
D. Nakauchi;N. Kawano;N. Kawaguchi;T. Yanagida
中科院分区：
文献类型：
--
作者：
D. Nakauchi;N. Kawano;N. Kawaguchi;T. Yanagida
采用溶剂扩散法制备（C6H5(CH2)4NH3）2BaxPb1−xBr4 （x = 0、0.1、0.25和0.5）晶体，考察其闪烁性能。样品表现出光致发光和闪烁，由于激子的作用，在440 nm附近有一个尖锐的发射峰，衰变时间主要为几纳秒。137Cs伽玛射线辐照下的脉冲高度谱表明，（C6H5(CH2)2NH3）2Ba0.25Pb0.75Br4和（C6H5(CH2)2NH3）2Ba0.5Pb0.5Br4晶体的闪烁光产额约为19000 ph MeV−1。
(C6H5(CH2)4NH3)2BaxPb1−xBr4 (x = 0, 0.1, 0.25 and 0.5) crystals were prepared by the solvent diffusion method to evaluate the scintillation properties. The samples exhibit photoluminescence and scintillation with a sharp emission peaking around 440 nm due to excitons, and the decay time is dominantly several nanoseconds. The pulse height spectrum under 137Cs gamma-ray irradiation demonstrates that the scintillation light yields of (C6H5(CH2)2NH3)2Ba0.25Pb0.75Br4 and (C6H5(CH2)2NH3)2Ba0.5Pb0.5Br4 crystals are approximately 19 000 ph MeV−1.