Thermoluminescence and optically stimulated luminescence properties of Dy³⁺-doped CaO–Al₂O₃–B₂O₃-based glasses

We developed Dy³⁺-doped CaO–Al₂O₃–B₂O₃ based glasses with Dy concentrations of 0.5, 1.0, and 2.0 mol% using a melt-quenching technique. The as-synthesized glasses were applicable as materials exhibiting thermoluminescence (TL) and optically stimulated luminescence (OSL). The optical and radiation response properties of the glasses were characterized. In the photoluminescence (PL) spectra, two emission bands due to the ⁴F_9/2 → ⁶H_15/2 and ⁴F_9/2 → ⁶H_13/2 transitions of Dy³⁺ were observed at 480 and 580 nm. In the OSL spectra, the emission band due to the ⁴F_9/2 → ⁶H_15/2 transition of Dy³⁺ was observed. Excellent TL and OSL responses were observed for dose ranges of 0.1–90 Gy. In addition, TL fading behavior was better than that of OSL in term of the long-time storage. These results indicate that the Dy³⁺-doped CaO–Al₂O₃–B₂O₃-based glasses are applicable as TL materials.