A comparative thermoluminescence and electron spin resonance study of synthetic carbonated A-type hydroxyapatite

► Synthetic hydroxyapatite was carbonated with CO2. ► TL enhanced by 12 times in carbonated synthetic A-type hydroxyapatite. ► EPR and TL were performed to find out a relation between CO2− center and the TL. ► No direct relation was found between the CO2− center and TL enhancement.