Sol‐gel synthesis of strontium aluminate phosphor and its TL and OSL properties

SrAl2O4 monoclinic and Sr12Al14O33 cubic phase nanocrystals were synthesized using sol-gel route and their morphology verified with X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) to confirm the crystallinity of the samples and the crystallites nanoscale. Luminescence emissions were investigated by Optically Stimulated Luminescence (OSL) and Thermoluminescence (TL) methods in samples thermally treated at 1000 °C for 2 h and irradiated with β particles. TL glow curve was complex with 9 individual peaks, which was analyzed by Tm-Tstop method, general order kinetic theory using Computerized Glow Curve Deconvolution (CGCD). A thermal transfer TL phenomenon was observed when the samples were pre-heated in Tm-Tstop procedure. CW-OSL decays measured at 30 °C have high intensities even in low doses region and curves were deconvoluted using general order kinetic theory suppling two components for low doses and three components for high dose. •SrAl2O4 monoclinic and Sr12Al14O33 cubic phase nanocrystals were synthesized using sol-gel route.•Crystallites sizes by Scherrer Equation were about (42 ± 7) nm for cubic phase and (35 ± 4) nm for monoclinic phase.•Computerized Glow Curve Deconvolution (CGCD) and Tm-Tstop were used for TL emission.•CW-OSL curves were deconvoluted using general order kinetic.•CW-OSL intensities even in low doses region, supplying a minimum detectable dose of 2 mGy.