Thermoluminescence properties of potassium-borosilicate glasses doped with Tb ion

Abstract

We synthesized Tb-doped potassium borosilicate glasses using the melt-quenching method for application in personal dosimeters. Photoluminescence (PL) and thermoluminescence (TL) were observed and were attributed to the 4f-4f transitions of Tb³⁺ ions. The concentration dependence of PL and TL properties was investigated by varying the Tb concentration from 0 to 3.0 %. The quantum yield increased with rising Tb concentration. The PL decay time remained consistent across all Tb-doped samples with a typical value of ∼4.5 ms for Tb³⁺. The TL glow curves showed a glow peak at approximately 60 °C for all the samples. The 0.1 % sample showed the highest TL intensity. The dynamic range of the 0.1 % sample ranged from 0.01 mGy to 1 Gy.