Zhou Quan, Ren Jiwei, Xiao Jiawen, Lei Lin, Liao Feiyi, Di Haipeng, Wang Chao, Yang Lijun, Chen Qi, Yang Xiaofang, Zhao Yiying, Han Xiaodong
Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China.
Institute of Microstructure and Property of Advanced Materials, Beijing Key Lab of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
Nanoscale. 2021 Dec 13;13(47):19894-19902. doi: 10.1039/d1nr03996b.
Progress towards high performance X-ray detection and dynamic imaging applications, including nondestructive inspection, homeland security, and medical diagnostics, requires scintillators with a high light yield, a reasonable decay time, low cost, and eco-friendliness. Recently, copper halide scintillators have drawn tremendous attention due to their outstanding radioluminescence performance. Here, we first employed β-CsCuCl as a high-performance scintillator, with a photoluminescence quantum yield (PLQY) of 94.6%, a radioluminescence light yield of 34 000 ± 4000 photons per MeV, a low detection limit of 81.7 nGy s, and good operational stability under a total X-ray dose of 174.6 Gy in air. In addition, this scintillator presents a high spatial resolution of 9.6 lp mm at the modulation transfer function of 0.2 and a superb performance at 60 frames per second in our X-ray imaging system. Overall, this highly efficient scintillator demonstrates outstanding comprehensive performance and shows great potential for broad applications in X-ray detection and dynamic imaging.
要在包括无损检测、国土安全和医学诊断在内的高性能X射线检测和动态成像应用方面取得进展，需要具有高光输出、合理衰减时间、低成本和环境友好性的闪烁体。最近，卤化铜闪烁体因其出色的辐射发光性能而备受关注。在此，我们首次将β-CsCuCl用作高性能闪烁体，其光致发光量子产率（PLQY）为94.6%，辐射发光光输出为每兆电子伏特34000±4000个光子，低检测限为81.7 nGy s，并且在空气中174.6 Gy的总X射线剂量下具有良好的操作稳定性。此外，该闪烁体在调制传递函数为0.2时呈现出9.6 lp mm的高空间分辨率，并且在我们的X射线成像系统中以每秒60帧的速度表现出卓越性能。总体而言，这种高效闪烁体展现出出色的综合性能，并在X射线检测和动态成像的广泛应用中显示出巨大潜力。
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