Influence of CeO2 on scintillating properties of Tb3+-doped silicate glasses
来源期刊：Journal of Rare Earths2010年第3期
论文作者：孙心瑗 顾牡 张敏 黄世明
文章页码：340 - 344
摘 要：A series of Tb3+-,Ce3+-doped,and Tb3+/Ce3+-codoped silicate glasses were synthesized by melt-quenching technique.Some properties of the investigated glasses were characterized by X-ray photoelectron spectroscopy（XPS）,photoluminescence（PL）,X-ray excited luminescence（XEL） and thermoluminescence（TL） spectra.The result of XPS revealed that both Ce3+ and Ce4+ ions coexisted in these silicate glasses,and energy transfer from Ce3+ to Tb3+ ions was observed under UV excitation.However,under X-ray excitation the XEL intensity of Tb3+ emission decreased dramatically upon introduction of CeO2 to the Tb3+-doped silicate glass,the higher the content of CeO2 was,the lower the intensity of Tb3+ emission was.A proposed TL mechanism was developed based the observed TL and XEL spectra.It was concluded that a cerium-related killer center formed in silicate glass with the introduction of CeO2,which competed the capture of electrons with Tb3+ luminescence center under X-ray excitation.
孙心瑗1，顾牡2，张敏3，黄世明2
1. Department of Physics,Jinggangshan University2. Shanghai Key Laboratory of Special Artifical Microstructure Materials & Technology,Department of Physics,Tongji University3. College of Mechanical & Electrical Engineering,Jiaxing University
摘 要：A series of Tb3+-,Ce3+-doped,and Tb3+/Ce3+-codoped silicate glasses were synthesized by melt-quenching technique.Some properties of the investigated glasses were characterized by X-ray photoelectron spectroscopy（XPS）,photoluminescence（PL）,X-ray excited luminescence（XEL） and thermoluminescence（TL） spectra.The result of XPS revealed that both Ce3+ and Ce4+ ions coexisted in these silicate glasses,and energy transfer from Ce3+ to Tb3+ ions was observed under UV excitation.However,under X-ray excitation the XEL intensity of Tb3+ emission decreased dramatically upon introduction of CeO2 to the Tb3+-doped silicate glass,the higher the content of CeO2 was,the lower the intensity of Tb3+ emission was.A proposed TL mechanism was developed based the observed TL and XEL spectra.It was concluded that a cerium-related killer center formed in silicate glass with the introduction of CeO2,which competed the capture of electrons with Tb3+ luminescence center under X-ray excitation.
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