新型闪烁晶体Ce掺杂焦硅酸钇(YPS：Ce)的闪烁与热释光性能  

Scintillation and Thermoluminescence Properties of a New Scintillator YPS:Ce

作　　者：冯鹤[1] 丁栋舟[1] 李焕英[1] 杨帆[1] 陆晟[1] 潘尚可[1] 陈晓峰[1] 张卫东[1] 任国浩[1] 

机构地区：[1]中国科学院上海硅酸盐研究所中试基地,上海201800

出　　处：《无机材料学报》2010年第8期801-805,共5页Journal of Inorganic Materials

基　　金：上海市自然科学基金(09ZR1435800);国家“863”计划(2007AA03Z444);中国科学院知识创新工程青年人才领域前沿项目(SCX200701,SCX200708)

摘　　要：通过区熔法获得了铈掺杂焦硅酸钇闪烁单晶(Y_2Si_2O_7:Ce^(3+),简写为YPS),并对其闪烁与热释光性能进行了研究.对YPS:Ce闪烁晶体的透过、光输出和光衰减等光学和闪烁性能进行了表征,并对其综合性能进行了评价.其衰减时间为30.16ns,为目前铈掺杂焦硅酸盐闪烁晶体中最快的.并采用热释光测试技术,对YPS:Ce晶体中的缺陷进行了研究,发现在300～500K温度区间内一共有三个热释光峰,分别对应于三个缺陷,通过对二维(温度-光强)的拟合,确定了这三种缺陷的陷阱深度、振动频率等物理参数.并结合三维(温度-波长-光强)热释光谱,提出了YPS:Ce的热释光模型.Cerium doped yttrium pyrosilicate Y_2Si_2O_7：Ce（YPS） single crystal was obtained through the floating zone method.The scintillation and thermoluminescence（TL） properties of YPS：Ce were studied.The scintillation and optical properties of YPS：Ce crystal were characterized by light output,decay time and transmittance.Its potential application prospect as scintillation material was also evaluated.It was noticed that the decay time of YPS：Ce was about 30.16 ns,which was the fastest value in the cerium doped silicate scintillators.The traps in YPS：Ce were studied through TL spectrum.Three traps were detected in the temperature range of 300-500 K,corresponding to three trap in YPS：Ce sample.The physical parameters of these traps（including energy level,frequency factor） were determined through fitting the 2D（temperature-luminescence intensity） TL curve.Combined with 3D（temperature-wavelength -luminescence intensity） TL spectra,the TL mode of YPS：Ce sample was proposed.

关 键 词：YPS:Ce晶体 闪烁性能 热释光 缺陷 

分 类 号：O734[理学—晶体学]