新型闪烁晶体Ce掺杂焦硅酸钇(YPS:Ce)的闪烁与热释光性能

doi:10.3724/SP.J.1077.2010.00801

无机材料学报 ›› 2010, Vol. 25 ›› Issue (8): 801-805.DOI: 10.3724/SP.J.1077.2010.00801 CSTR: 32189.14.SP.J.1077.2010.00801

新型闪烁晶体Ce掺杂焦硅酸钇(YPS:Ce)的闪烁与热释光性能

冯鹤, 丁栋舟, 李焕英, 杨帆, 陆晟, 潘尚可, 陈晓峰, 张卫东, 任国浩

(中国科学院上海硅酸盐研究所中试基地, 上海 201800)

收稿日期:2009-12-09 修回日期:2010-01-25 出版日期:2010-08-20 网络出版日期:2010-07-19
基金资助:
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)

Scintillation and Thermoluminescence Properties of a New Scintillator YPS:Ce

FENG He, DING Dong-Zhou, LI Huan-Ying, YANG Fan, LU Sheng, PAN Shang-Ke, CHEN Xiao-Feng,ZHANG Wei-Dong, REN Guo-Hao

(R&D Center of Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China)

Received:2009-12-09 Revised:2010-01-25 Published:2010-08-20 Online:2010-07-19

摘要/Abstract

摘要：

通过区熔法获得了铈掺杂焦硅酸钇闪烁单晶(Y₂Si₂O₇:Ce³⁺, 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.

关键词: YPS:Ce晶体, 闪烁性能, 热释光, 缺陷

Abstract:

Cerium doped yttrium pyrosilicate Y₂Si₂O₇: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.

Key words: YPS:Ce crystal, scintillation properties, thermoluminescence, trap

中图分类号:

O734

冯鹤, 丁栋舟, 李焕英, 杨帆, 陆晟, 潘尚可, 陈晓峰, 张卫东, 任国浩. 新型闪烁晶体Ce掺杂焦硅酸钇(YPS:Ce)的闪烁与热释光性能[J]. 无机材料学报, 2010, 25(8): 801-805.

FENG He, DING Dong-Zhou, LI Huan-Ying, YANG Fan, LU Sheng, PAN Shang-Ke, CHEN Xiao-Feng,. Scintillation and Thermoluminescence Properties of a New Scintillator YPS:Ce[J]. Journal of Inorganic Materials, 2010, 25(8): 801-805.

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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

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