Abstract
The composition of the matrix glass has a significant effect on the luminescent property and density of the scintillating glass. In this paper, the Ce3+/Tb3+ co-doped Gd2O3-B2O3-SiO2 (GBS) scintillating glasses were melted in reducing atmosphere. The effects of Gd3+ on the luminescent property and density of scintillating glass were studied. The results show that increasing Gd3+ ions concentration can increase the density of the scintillating glass. The energy transfer from Gd3+ to Tb3+ in the glass can sensitizes the luminescence of Tb3+ ions. Meanwhile, the increase of Gd3+ ions concentration increases the optical basicity of the glass and the electrons on the Ce3+ ion 4f orbit are more likely to migrate to 5d orbit, which promotes the energy transfer from Ce3+ to Tb3+. However, the concentration of Gd3+ ions is too high to cause concentration quenching and Ce3+ ion charge transfer quenching, which are not conducive to the light of the glass.
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