稀土共晶闪烁材料研究进展

Research Progress of Rare Earth Eutectic Scintillation Materials

闪烁材料已经被广泛用于高能物理、核医学影像、工业无损检测、港口安全检查、地质勘探、航天探测等领域。具有5d→4f允许跃迁的三价稀土离子激活的稀土闪烁材料具有高光输出和快荧光衰减特性,已成为无机闪烁材料的重要组成部分。随着上述各应用领域,尤其是核医学诊断对成像分辨率提出了越来越高要求,核医学影像对探测成像设备的核心材料——闪烁材料性能的要求也有了更高的要求。最近研究表明,具有有序微纳结构的共晶闪烁材料由于具有微米级的像素单元,在对高能射线探测中可显著提高成像分辨率,而受到了特别的关注。本文从共晶闪烁材料的制备、性能优化及应用等方面,综述了稀土共晶闪烁材料中有序微纳结构的形成机制及其对材料闪烁性能的影响,以及近年来稀土共晶闪烁材料的研究进展。

Scintillation materials have been widely used in the fields of high energy physics, nuclear medical ima-tor. Recently, eutectic scintillation materials with well-organized micro-pixels, which can significantly improve the imaging resolution in the detection for high-energy ray, have received special attentions. This work summarized the forming mechanism of well-organized micro-nano structure in eutectic scintillation materials and the effect on the properties of scintillation materials, then reviewed the research progress of rare-earth eutectic scintillation materials from the aspects of preparation, performance optimization and application.