Optical and dosimeter properties of Li₂O–Al₂O₃–B₂O₃ based glasses

抄録

In this study, we report on the optical and thermolumienscence (TL) properties of newly developed (30 − x)Li₂O–20Al₂O₃–50B₂O₃–2xCeO₂ (values are in mol %) glass dosimeters prepared by a conventional melt quenching method. The optical absorption spectra showed broad absorption band in the 200–370 nm wavelength with Ce-doping. The photoluminescence (PL) band appeared near the wavelength of 365 nm under excitation at 240, 270, and 315 nm, which is due to the transition from 5d excited states to 4f (²F_5/2, ²F_7/2) ground states of Ce³⁺. In the TL glow curve measurements, the Ce-doped glasses exhibited a dominant glow peak in the 370–425 K temperature range. The 0.5 cat% Ce-doped glass (x = 0.5) showed the highest TL intensities in our prepared glasses. The 5d–4f (²F_5/2, ²F_7/2) emission band of Ce³⁺ also appeared in the 365 nm wavelength range in the TL spectrum. TL response in the dynamic range was confirmed using the 0.5 cat% Ce-doped glass over 10⁻³–10² Gy X-ray dose.