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PbWO4:(Sb,Y)晶体的发光和闪烁性能研究 预览 被引量:1

Investigation of Luminescence and Scintillation Properties of PbWO4: ( Sb, Y ) Crystals
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摘要 本文报道了用多坩埚下降法生长的大尺寸PbWO4:(Sb,Y)晶体的光谱和闪烁性能.基于透射光谱、X射线激发的发射谱、紫外激发及其发射谱、光产额和超短脉冲X射线激发荧光寿命等方面的测试,讨论了Sb,Y双掺杂对PbWO4晶体的光谱和闪烁性能的作用.结果表明:Sb,Y双掺杂能显著改善PbWO4晶体的光谱性能和闪烁性能,使PbWO4晶体在短波方向的透过率明显提高;对于尺寸为23×23×20mm3的掺杂晶体样品,光产额最大值大约为50 p.e./MeV,约为BGO光产额的6.0%;发光成份中有1.9ns和15.8ns两个衰减时间常数的快成份. This paper presents the luminescence and scintillation properties studies on doubly-doped PbWO4:(Sb, Y) crystals. Based on the results of measuring their transmission spectra, X-ray excited luminescence spectra, photoluminescence spectra, light yield and luminescence decay time, the influences of combined doping with Sb and Y dopants on the optical and scintillation properties of PbWO4 crystals have been discussed. The results show that doping PbWO4 crystals with Sb and Y can improve the light yield and spectroscopic properties. The maximum light yield of 50 p.e./MeV (about 6% of light yield in BGO) was obtained in PbWO4:(Sb, Y) crystal with bialkali photomultiplier for a fixed condition of the crystal size of 23 × 23 × 20 mm3 and the gate width of 200ns. The Sb and Y co-doped PbWO4 crystal presents a faster decay component tau;(τ1=1.9 ns, τ=15.8 ns) than the undoped PbWO4 (τ=2.7 ns, τ2=9.6 ns, τ3=37.0 ns).
作者 谢建军 杨培志 袁晖 廖晶莹 殷之文 曹顿华 顾牡 XIE Jian-jun~1, YANG Pei-zhi~1,YUAN Hui~1, LIAO Jing-ying~1, YIN Zhi-wen~1,CAO Dun-hua~2, GU Mu~2 (1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050,China; 2.Department of Physics, Tongji University, Shanghai 200092,China)
出处 《人工晶体学报》 EI CAS CSCD 北大核心 2005年第1期 12-16,共5页 Journal of Synthetic Crystals
基金 国家自然科学基金,中国科学院知识创新工程项目
关键词 PBWO4晶体 闪烁性能 发光 发射谱 坩埚下降法 光谱 掺杂 短波 超短脉冲 大尺寸 PbWO_4:(Sb,Y) light yield spectroscopic property scintillation property
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参考文献15

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共引文献24

同被引文献11

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