Abstract
The glass-forming regions of tellurium-gadolinium-tungsten ternary system prepared at 1000 °C for 60 min were firstly determined. To improve density, the full replacement of lutetium for gadolinium to form Tb3+-activated tellurium-lutetium-tungsten glasses with the composition of 64TeO2-20WO3-(16–y)Lu2O3-yTb2O3 were designed for scintillation application. The concentration-dependent optical properties of Tb3+-activated tellurium-lutetium-tungsten glasses were fully investigated by transmittance, excitation and emission spectra, together with the luminescence decay curves. The energy transfer mechanism was discussed according to Huang's rule. The optimized 4 mol% Tb2O3 activated tellurium-lutetium-tungsten glasses with the density of 6.49 g/cm3 and the lifetime of 0.551 ms are developing to be suitable for the potential detection of slow events in the future work.
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