Abstract
AbstractThis report presents the luminescence properties of Tb3+‐doped oxide glasses with high Gd2O3 (25 mol%) concentration under UV and X‐ray excitation. The intense green 5D4 → 7FJ luminescence is observed with strong luminescence quenching of the 5D3 level due to cross‐relaxation process. Energy transfer from Gd3+ to Tb3+ ions is confirmed by both luminescence spectra and decay measurements. The integral scintillation efficiency obtained for the 0.5 wt% Tb3+‐doped glass under X‐ray excitation is of about 40% of that of the reference Bi4Ge3O12 crystal.
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