高光输出快衰减Pr: Lu3Al5O12闪烁陶瓷的制备和成像

doi:10.3724/SP.J.1077.2014.13389

无机材料学报 ›› 2014, Vol. 29 ›› Issue (5): 534-538.DOI: 10.3724/SP.J.1077.2014.13389

高光输出快衰减Pr: Lu₃Al₅O₁₂闪烁陶瓷的制备和成像

沈毅强^{1, 2}, 石云¹, 潘裕柏¹, 冯锡淇¹, 吴乐翔¹, 寇华敏¹, 章志明³, 魏龙³

(1. 中国科学院上海硅酸盐研究所, 透明和光功能先进无机材料重点实验室, 上海200050; 2. 中国科学院大学, 北京 100049; 3. 中国科学院高能物理研究所, 北京 100049)

收稿日期:2013-08-07 修回日期:2013-12-03 出版日期:2014-05-20 网络出版日期:2014-04-24
作者简介:沈毅强(1986–), 男, 博士研究生. E-mail: shenyiqiang@student.sic.ac.cn
基金资助:
国家自然科学基金(11005139, 51172262); 中科院上海硅酸盐所创新基金(Y32ZC3130G); 上海科委基金项目(11DZ1140302)

Fabrication and 2D-mapping of Pr: Lu₃Al₅O₁₂ Scintillator Ceramics with High Light Yield and Fast Decay Time

SHEN Yi-Qiang^{1, 2}, SHI Yun¹, PAN Yu-Bai¹, FENG Xi-Qi¹, WU Le-Xiang¹, KOU Hua-Min¹, ZHANG Zhi-Ming³, WEI Long³

(1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050,China; 2. University of Chinese Academy of Sciences, Beijing 100049,China; 3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049,China)

Received:2013-08-07 Revised:2013-12-03 Published:2014-05-20 Online:2014-04-24
About author:SHEN Yi-Qiang. E-mail: shenyiqiang@student.sic.ac.cn
Supported by:
National Natural Science Foundation of China (11005139, 51172262); Innovationed Foundation of Shanghai Insititute of Ceramics, Chinese Academy of Sciences (Y32ZC3130G); Science and Technology Foundation of Shanghai (11DZ1140302)

摘要/Abstract

摘要： 采用真空烧结固相反应法, 分别制备了不添加和添加烧结助剂(正硅酸乙酯TEOS和MgO)的Pr:LuAG ( Pr: Lu₃Al₅O₁₂)陶瓷, 研究发现添加烧结助剂烧制的Pr:LuAG陶瓷在可见光区的直线透过率可达～80%, 不添加烧结助剂的陶瓷光学透过率降低(可见光区~70%, 2 mm厚), 但光输出提高了5倍(为1196 pe/MeV), 衰减快分量比例可达73%, 能量分辨率8.4%。将Pr:LuAG陶瓷加工成1.9 mm×1.9 mm×1.0 mm的陶瓷阵列组装探测器模块, 用4×4陶瓷阵列单元实现了二维散点图成像, 所成散点图清晰可辨。经过平台测试, 相同耦合条件下本实验制备的Pr:LuAG陶瓷成像质量优于商用BGO (Bi₄Ge₃O₁₂)单晶, 结果显示Pr:LuAG陶瓷有望应用于PET (Positron Emission Tomography) 级别核医学成像系统。

关键词: Pr:LuAG, 透明陶瓷, 退火, 闪烁性能, 成像

Abstract: Pr:LuAG ceramics were fabricated by a solid state reaction method using vacuum sintering with or without sintering aids (TEOS and MgO). The inline transmittance of the Pr:LuAG ceramics sintered with sintering aids reached ~80% in visible light range, while the ceramics without sintering aids were 5 times higher light output (1196 pe/MeV) and faster decay (73% fast decay component) although lower transmittance in visible light region (~70%, 2.0 mm thick) comparatively with the energy resolution of 8.4%. The Pr:LuAG cermics were cut and polished to 1.9 mm×1.9 mm× 1.0 mm pixels to form ceramics arrays, by using the 4×4 ceramics arrays, 2D mapping was accomplished. The position signals were clearly identified, which were better than that of commercial BGO (Bi₄Ge₃O₁₂) crystals. It is proved that Pr:LuAG ceramics is promising in PET (Positron Emission Tomography) imaging.

Key words: Pr:LuAG ceramics, annealing, scitillation performance, mapping

中图分类号:

TQ174

沈毅强, 石云, 潘裕柏, 冯锡淇, 吴乐翔, 寇华敏, 章志明, 魏龙. 高光输出快衰减Pr: Lu₃Al₅O₁₂闪烁陶瓷的制备和成像[J]. 无机材料学报, 2014, 29(5): 534-538.

SHEN Yi-Qiang, SHI Yun, PAN Yu-Bai, FENG Xi-Qi, WU Le-Xiang, KOU Hua-Min, ZHANG Zhi-Ming, WEI Long. Fabrication and 2D-mapping of Pr: Lu₃Al₅O₁₂ Scintillator Ceramics with High Light Yield and Fast Decay Time[J]. Journal of Inorganic Materials, 2014, 29(5): 534-538.

参考文献

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[5] NIKL M, OGINO H, KRASNIKOV A, et al. Photo- and radioluminescence of Pr-doped Lu3Al5O12 single crystal. Phys. Status Solidi A-Appl Res. ,2005, 202(1): R4–R6.

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[8] NIKL M, PEJCHAL J, MIHOKOVA E, et al. Antisite defect-free Lu3(GaxAl1-x)5O12 : Pr scintillator. Applied Physics Letters, 2006, 88(14): 141916–1–3.

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高光输出快衰减Pr: Lu₃Al₅O₁₂闪烁陶瓷的制备和成像

Fabrication and 2D-mapping of Pr: Lu₃Al₅O₁₂ Scintillator Ceramics with High Light Yield and Fast Decay Time

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