1. Luminescence, scintillation, and energy transfer in SiO2-Al2O3-B2O3-Gd2O3:Ce3+,Pr3+ glasses.
- Author
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Lertloypanyachai, Prapon, Chewpraditkul, Weerapong, Pattanaboonmee, Nakarin, Chen, Danping, Babin, Vladimir, Beitlerova, Alena, and Nikl, Martin
- Subjects
LUMINESCENCE ,SCINTILLATORS ,ENERGY transfer ,SILICA ,ALUMINUM compounds ,CERIUM compounds ,METALLIC glasses - Abstract
Ce
3+ ,Pr3+ -codoped SiO2 -Al2 O3 -B2 O3 -Gd2 O3 glasses (SABG:Ce,Pr) were prepared by melt quenching under a CO reducing atmosphere. Luminescence properties were investigated under UV and X-ray excitations. A dominant emission band at 430 nm belonging to the Ce3+ :5d1 → 4f transition was observed in the photo- and radio-luminescence spectra. The energy transfer occurs from this Ce3+ band toward the3 PJ levels of Pr3+ with an efficiency of up to 24%, followed by the reduction of integrated luminescence intensity with an increasing Pr3+ concentration. This result is attributed to the increase in the reabsorption of Ce3+ luminescence and the non-radiative energy transfer toward the3 PJ levels of Pr3+ . The cross-relaxation process within the Pr3+ pairs can further diminish the total luminescence yield at high Pr3+ concentrations. The integral scintillation efficiency and light yield measurements were carried out and compared to the reference Bi4 Ge3 O12 (BGO) crystal. [ABSTRACT FROM AUTHOR]- Published
- 2017
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