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.

中文翻译：

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Tb3+活化的碲-镥-钨玻璃的玻璃形成区和浓度依赖性发光特性

摘要 首先确定了碲-钆-钨三元体系在1000°C、60 min 条件下的玻璃形成区域。为了提高密度，将镥完全替代钆以形成由 64TeO2-20WO3-(16-y)Lu2O3-yTb2O3 组成的 Tb3+ 活化的碲-镥-钨玻璃，用于闪烁应用。通过透射、激发和发射光谱以及发光衰减曲线，充分研究了 Tb3+ 激活的碲-镥-钨玻璃的浓度依赖性光学特性。根据黄氏法则讨论了能量传递机制。优化的 4 mol% Tb2O3 活化碲-镥-钨玻璃，密度为 6.49 g/cm3，寿命为 0.