Development of a fast radiation detector based on barium fluoride scintillation crystal
Development of a fast radiation detector based on barium fluoride scintillation crystal
复制标题
基于氟化钡闪烁晶体的快速辐射探测器的研制
DOI：
10.1063/1.4812789
复制
发表时间：
2013-07-01
影响因子：
1.6
通讯作者：
Li, Gang
中科院分区：
文献类型：
--
作者：
Han, Hetong;Zhang, Zichuan;Li, Gang
氟化钡（BaF 2）是一种无机闪烁材料，由于其相对较高的密度，等效原子序数，辐射硬度和高发光性，用于检测X/γ辐射。BaF 2由于其瞬发衰变发射成分，具有用于伽马射线计时实验的潜在能力。已知来自BaF 2的光输出具有三个衰减分量：在大约195 nm和220 nm处的两个瞬变分量，衰减常数大约为600-800 ps，以及在大约310 nm处的更强的慢分量，衰减常数大约为630 ns，这阻碍了快速定时实验。本文报道了一种基于BaF_2闪烁晶体的快速辐射探测器的研制，它采用了一种特殊的滤光器件--多重反射多路紫外区短波长通光波导（MRMP-short-pass filter），利用选择性反射技术，使慢光分量的强度降低到1%以下。本研究所采用的方法为利用多波段闪烁晶体设计辐射探测器提供了一种新的途径。(C)2013 AIP Publishing LLC.
Barium fluoride (BaF2) is an inorganic scintillation material used for the detection of X/gamma radiation due to its relatively high density, equivalent atomic number, radiation hardness, and high luminescence. BaF2 has a potential capacity to be used in gamma ray timing experiments due to the prompt decay emission components. It is known that the light output from BaF2 has three decay components: two prompt of those at approximately 195 nm and 220 nm with a decay constant around 600-800 ps and a more intense, slow component at approximately 310 nm with a decay constant around 630 ns which hinders fast timing experiments. We report here the development of a fast radiation detector based on a BaF2 scintillation crystal employing a special optical filter device, a multiple reflection multi-path ultraviolet region short-wavelength pass light guides (MRMP-short pass filter) by using selective reflection technique, for which the intensity of the slow component is reduced to less than 1%. The methods used for this study provide a novel way to design radiation detector by utilizing scintillation crystal with several emission bands. (C) 2013 AIP Publishing LLC.