Thermoluminescence properties of Tb3+-doped CaO–Al2O3–B2O3-based glasses.

Abstract In this study, the thermoluminescence (TL) characteristics and X-ray radiation response properties of 35CaO–15Al 2 O 3 –50B 2 O 3 : x Tb 4 O 7 (x = 0.25, 0.5, 1.0, 2.0, and 4.0 mol%) glasses were evaluated. These glasses, prepared by a conventional quenching method, were transparent and non-hygroscopic. The TL spectra showed a green band emission (400–600 nm) arising from 4fn–4fn forbidden transitions of the Tb3+ ions. A TL glow peak was observed at 360 K in all the glasses at different Tb concentrations. Among them, the 1.0, 2.0, and 4.0 mol% Tb-doped glasses exhibited excellent linearity over the 1.0 mGy–10 Gy irradiation dose range. The TL peak intensity decreased to ∼60% after 1 h, ∼45% after 24 h and ∼30% after 72 h. Highlights • TL properties of Tb3+-doped CaO–Al 2 O 3 –B 2 O 3 -based glasses were evaluated. • The TL spectra exhibited emission bands in the wavelength region from 400 to 600 nm. • A TL glow peak was observed at 360 K in all the glasses at different Tb concentrations. • Tb-doped glasses exhibited linearity over the 1.0 mGy–10 Gy irradiation dose range. [ABSTRACT FROM AUTHOR]