Thermoluminescence and optically stimulated luminescence properties of the 0.5P2O5–xBaO–(0.5−x)Li2O glass systems

Thermoluminescence and optically stimulated luminescence properties of phosphate glasses doped with BaO and Li2O at various concentrations were studied. Lithium-doped glasses show a broad TL peak in the 200–300 °C region with poor dosimetric characteristics. Barium-doped glasses feature at least two TL peaks, approximately at 200 and 400 °C, which were attributed to Ba2+ ions. They also produce a fast-decaying OSL signal correlated with the lower-temperature TL peak. Responses of both TL emissions to radiation doses up to 100 Gy are linear (R2>0.99). Due to its encouraging characteristics such as acceptable batch homogeneity, good measurement reproducibility and weak signal fading, the P2O5–BaO glass can be considered as a candidate material for dosimetry in the high-dose range (>10 Gy).