超快闪烁晶体研究进展

摘要/Abstract

摘要： 随着高重频辐射成像技术的发展和时间飞行技术在核医学成像领域的应用, 超快闪烁晶体的重要性愈加凸显, 已经成为闪烁晶体研究领域的热点方向。目前获得应用的超快闪烁晶体主要有三类: 芯带价带发光闪烁晶体, 直接带隙半导体, 发光有强热淬灭闪烁晶体。这些闪烁晶体具有小于3 ns 的闪烁衰减时间, 已经在高重频辐射成像、高能物理实验以及核物理实验等领域获得应用。但是这些晶体光产额较低、能量分辨率较差, 有些晶体闪烁发光还有慢分量, 这些缺点制约了它们在诸如正电子发射断层扫描等领域的应用。因此需要在发光机制及晶体制备等方面进行创新, 以制备出满足新的应用需求的超快闪烁晶体。

关键词: 材料, 人工晶体, 超快闪烁, 衰减时间, 光输出

Abstract: With the development of high repetition radiation imaging and application of time of flight in nuclear medicine imaging, the ultrafast scintillation crystals are essential and become one of the research focuses. At present, there are three kinds of applied ultrafast scintillation crystals: core-valence luminescence crystals, direct band gap semiconductors and thermal quenching scintillation crystals. These scintillation crystals show decay time of less than 3 ns and have been applied in the high repetition radiation imaging, particle physics experiments and nuclear experiments. However, their light yield is low and energy resolution is poor, and slow luminescence component is also observed. These disadvantages limit their applications in many fields, such as positron emission computed tomography (PET). Therefore, the innovations are needed both in scintillation mechanism and crystals preparation to obtain the scintillation crystals satisfying the requirements of the most applications.

Key words: materials, synthetic crystal, ultrafast scintillation, decay time, light output

中图分类号:

O734+.3

杨帆, 任国浩. 超快闪烁晶体研究进展[J]. 量子电子学报, 2021, 38(2): 243-258.

YANG Fan, REN Guohao. Development of ultrafast scintillation crystals[J]. Chinese Journal of Quantum Electronics, 2021, 38(2): 243-258.

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