Thermoluminescence properties of CaO–B2O3 glass system doped with GeO2

• We investigate the TL properties of germanium doped calcium borate glass for the TLD used.
• The glasses were irradiated to 60Co gamma rays with doses ranging from 0.5 Gy to 4.0 Gy.
• The sample with a concentration of 0.1 mol% GeO2 has the best thermoluminescence characteristics.

The aim of this study is to investigate the thermoluminescence properties of germanium doped calcium borate glass for thermoluminescence dosimeter used. Glasses with composition (30−x) CaO–70B2O3: xGeO2 where x=0.1, 0.2, 0.3, 0.4 and 0.5 mol% were prepared using a melt-quenching method. The glasses were irradiated to 60Co gamma ray with doses ranging from 0.5 Gy to 4.0 Gy. The amorphous phases were identified for all glass samples. The glow curves were analyzed to determine various characterizations of a thermoluminescence dosimeter of the glass. It was found that the sample with a concentration of 0.1 mol% GeO2 has the best thermoluminescence characteristics such as linearity, sensitivity, fading characteristic, minimum detectable dose and effective atomic number. The results clearly showed that germanium doped calcium borate glass has a potential to be considered as the thermoluminescence dosimeter.