Luminescence characteristics of Dy3+ doped Gd2O3-CaO-SiO2-B2O3 scintillating glasses
来源期刊：Journal of Rare Earths2016年第6期
论文作者：J.Kaewkhao N.Wantana S.Kaewjaeng S.Kothan H.J.Kim
文章页码：583 - 589
摘 要：Glasses were prepared from the compositions of 25Gd2O3-10 CaO-10 SiO2-（55–x）B2O3-xDy2O3（where x is 0.0 mol.%–1.0 mol.%） by the conventional melt-quenching technique at 1400 oC. The results demonstrated the increase in the glass density with respect to the increase in the doping concentrations of Dy2O3. Nine absorption bands were observed. The emission spectra of the developed glass showed two strong peaks at 577 nm(4F9/2→6H13/2) and 482 nm(4F9/2→6H15/2). The highest emission intensity was observed from the developed glass prepared at 0.4 mol.% of Dy2O3, as the efficient energy transfer took place from Gd3+ to Dy3+. From the X-ray induced optical luminescence, the emission spectra were identical to those from PL measurements, but with the highest intensity observed from the glass quenched at 0.45 mol.% of Dy2O3. Finally, the integral scintillation efficiency of the developed glass was determined at 27% of that of the commercially available BGO crystal.
J.Kaewkhao1，N.Wantana1，S.Kaewjaeng2，S.Kothan2，H.J.Kim3
1. Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University2. Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University3. Department of Physics,Kyungpook National University
摘 要：Glasses were prepared from the compositions of 25Gd2O3-10 CaO-10 SiO2-（55–x）B2O3-xDy2O3（where x is 0.0 mol.%–1.0 mol.%） by the conventional melt-quenching technique at 1400 oC. The results demonstrated the increase in the glass density with respect to the increase in the doping concentrations of Dy2O3. Nine absorption bands were observed. The emission spectra of the developed glass showed two strong peaks at 577 nm(4F9/2→6H13/2) and 482 nm(4F9/2→6H15/2). The highest emission intensity was observed from the developed glass prepared at 0.4 mol.% of Dy2O3, as the efficient energy transfer took place from Gd3+ to Dy3+. From the X-ray induced optical luminescence, the emission spectra were identical to those from PL measurements, but with the highest intensity observed from the glass quenched at 0.45 mol.% of Dy2O3. Finally, the integral scintillation efficiency of the developed glass was determined at 27% of that of the commercially available BGO crystal.
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