中文摘要：

Ce：YAP晶体具有优良的闪烁性能，其主要特点是衰减时间短，光产额大，在高能射线探测、核医学等方面有着广阔的应用前景。考虑到Ce^3＋离子浓度可能对晶体性能的影响，用中频感应加热提拉法生长了系列掺杂浓度为0．05％～0．6％的Ce：YAP闪烁晶体，晶体尺寸为垂50mm×80mm。室温下测试了不同浓度Ce：YAP晶体的透过、荧光、X射线激发发射、X射线激发衰减等特征，分析了Ce^3＋离子浓度对Ce：YAP晶体的透过、荧光及闪烁性能的影响。结果表明：随着Ce^3＋离子浓度增加，Ce：YAP晶体的吸收边发生红移，造成了样品的自吸收，从而影响到Ce：YAP晶体的光输出；且随Ce^3＋离子浓度增加，Ce：YAP晶体的衰减时间减少。

英文摘要：

Cerium-doped orthoaluminate （YAP： Ce） is a kind of scintillator with high light yield and fast decay time, which makes it a good choice for applications in high-energy physics and medical imaging. To study the influence of Ce^3 ＋ concentration on the properties of Ce ： YAP crystals, a series of Ce： YAP crystals in size of φ 50 mm× 80 mm with concentration from 0.05% to 0.6% were grown by Czochralski method.Transmittance spectra, PL, XEL and decay time were measured at room temperature. The results showed that increasing the Ce^3＋ concentration led to a red shift of the absorption edge and self-absorption as well, thus will lower the light yield of Ce ： YAP crystals. The decay time of Ce ： YAP crystals also became faster with the increase of Ce^3＋ concentration.