Speaker
Description
Jessica Mosqueira-Yauri$^1$, Fanny Ramos-Chui $^1$ ,Edwar A. Canaza$^1$, Jorge Ayala-Arenas $^1$, Nilo F. Cano$^2$
$^1$Universidad Nacional de San Agustín, Arequipa, Perú
$^2$Universidade Federal de São Paulo, SP, Brazil
The thermoluminescence (TL) of a material depends on the synthesis process, the percentage and type of dopant used, and the impurities present in its crystal structure. Strontium borate (Sr$_3$ $B_2$$O_6$) is a material that is easily synthesized, and when rare earths are incorporated as dopants, its optical and physical properties are improved, allowing it to be used in different technologies such as LEDs.
In this work, pure strontium borate and doped with different concentrations of Ce were synthesized using the solid-state reaction method. For the synthesis, strontium carbonate (SrCO₃) and boric acid (H₃BO₃) were used as precursors for the synthesis of Sr3B2O6. The homogeneous mixture of these reagents in stoichiometric amounts was subjected to a temperature of 1000 °C for four hours and then slowly cooled inside the furnace to ensure the crystallinity of the sample. The structure of the material was verified by X-ray diffraction (XRD) measurements. The effect of the dopant percentage on the TL glow curves of Sr₃B₂O₆:Ce was observed, and it was found that the addition of Ce as a dopant increased the intensity of the TL peaks approximately fourfold compared to the undoped sample. The effect of heat treatment on TL was also analyzed. The TL glow curve for this material has three peaks: two weak peaks centered at 140 and 350 °C, and one strong peak at 250 °C. In addition, dosimetric properties such as repeatability, fading, linearity, and minimum detection dose were investigated. Finally, the kinetic parameters of the peaks of the TL glow curve were obtained using the Tm-Tstop and deconvolution methods.