Advanced inorganic halide ceramic scintillators
Advanced inorganic halide ceramic scintillators
复制标题
先进无机卤化物陶瓷闪烁体
DOI：
10.1016/j.optmat.2021.111307
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发表时间：
2021
影响因子：
3.9
通讯作者：
Parkhe, H.
中科院分区：
文献类型：
--
作者：
Hawrami, R.;Ariesanti, E.;Burger, A.;Parkhe, H.
在块体单晶闪烁体生长研究的同时，对陶瓷闪烁体的研究也取得了稳步进展。随着人们对低成本快速制备闪烁材料的兴趣增加，需要对闪烁陶瓷进行更多的研究。旨在优化光学透明陶瓷的研究可以与块状生长的晶体相媲美，这可能会降低成本，增加产量，增加体积，并在目前使用碘化钠和类似物的应用和系统中改善能量分辨率。需要密度高(>；5微克/厘米~3)、高效Z(>；60)、明亮(>；40,000光子/MeV)、对湿气不敏感的陶瓷闪烁体，以及那些可以在没有保护的情况下使用的闪烁体。超高速陶瓷材料也令人感兴趣。本文介绍了一种制备无机卤化物陶瓷闪烁体Cs2HfCl6(CHC)和Tl2HfCl6(THC)的设备设计和工艺。通过监测662keV的137Cs全能峰的能量分辨率和峰位，对CHC和THC陶瓷闪烁体的制作进行了改进和优化。对于直径为1英寸的CHC陶瓷闪烁体，其能量分辨率为5.4%(FWHM)，光产额为20,700℃/MeV；而对于直径为16 mm的THC陶瓷闪烁体，其能量分辨率为5.1%(FWHM)，光产额为27,800℃/MeV。测定了μS 0.6%(21%)和μS 3.0%(79%)的衰减时间，μS 0.3%(13%)和μS 1.0%(87%)的衰减时间。与单晶闪烁体相比，陶瓷CHC和THC闪烁体都有同样好的比例数据。
Research in ceramic scintillators has steadily progressed alongside the research in bulk single crystal scintillator growth. As interest in faster scintillation material production with lower cost increases, more research on scintillating ceramics is needed. Research targeting optimization of optically transparent ceramics that can rival bulk-grown crystals grown may lower cost, increase yield, increase volume, and improve energy resolution in applications and systems currently using sodium iodide and alike. Ceramic scintillators that are dense (>5 g/cm3), have high effective Z (>60), are bright (>40,000 photons/MeV), and are not sensitive to moisture as well as those that can be handled without protection are desired. Ultra-fast ceramic materials are also of interest. This paper presents an equipment design and technique to produce inorganic halide ceramic scintillators Cs2HfCl6(CHC) and Tl2HfCl6(THC). Improvements and optimization of CHC and THC ceramic scintillator fabrication are gauged by monitoring the energy resolution and peak position of137Cs full energy peak at 662 keV. With a 1-inch diameter CHC ceramic scintillator, energy resolution of 5.4% (FWHM) and light yield of 20,700 ph/MeV are achieved, while with a 16-mm diameter THC ceramic scintillator, energy resolution of 5.1% (FWHM) and light yield of 27,800 ph/MeV are achieved. Decay times of 0.6 μs (21%) and 3.0 μs (79%) are measured for CHC and 0.3 μs (13%) and 1.0 μs (87%) for THC. Both ceramic CHC and THC scintillators have similarly good proportionality data when compared to their single crystal counterparts.