Synthesis and thermoluminescence characterization of self-agglomerating CaSO₄ exposed to beta radiation

Highlights: • Thermoluminescence of self-agglomerating CaSO₄ phosphors is reported. • The thermoluminescence features of the synthesized CaSO₄ are promising for TL dosimetry applications. • Synthesized CaSO₄ samples are two times more sensitive than TLD-100 dosimeter. • Unlike other routes to synthesize CaSO₄, the employed one does not involves environmental pollution nor human health risk. - Abstract: The synthesis and thermoluminescence (TL) characterization of self-agglomerating pellet-shaped CaSO₄ phosphors, through a low cost and environmentally friendly method is reported. In order to investigate their TL features, some samples were exposed to beta particle irradiation in the dose range from 0.07 to 10 Gy. Characteristic TL glow curve consists of a single main maximum located at 216 °C, which is considered stable, hence, suitable for dosimetry applications. The dose-response was remarkable linear. Moreover, the lower detection limit was determined to be 6.0 μGy, and the relative TL sensitivity twice the one from the commercial TLD-100 dosimeter.