Study of kinetic parameters of thermoluminescent peaks of Al2O3:C,Mg

Abstract

In this research, it is proposed to use the thermoluminescence (TL) technique to determine the kinetic parameters of carbon and magnesium doped aluminum oxide crystals (Al2O3:C,Mg), a material recently developed to be applied as a fluorescent nuclear track detector (FNTD). Thermoluminescence is a phenomenon that occurs in semiconductor or insulating ionic crystals, which emits light when stimulated with thermal energy after being exposed to radiation. From the TL emission curve it is possible to obtain kinetic parameters, such as energy, frequency factor and peak kinetic order, which describe the material's physical characteristics. Preliminary beta-radiation studies have shown that Al2O3:C,Mg exhibits two secondary TL peaks around 40 and 70 °C and a high intensity peak (dosimetric) around 160 °C (1 °C / s). Besides the use of beta radiation, the objective of this work is to expand using both ionizing (X-ray and beta) and non-ionizing (ultraviolet) radiation in Al2O3:C,Mg. The research will be conducted in collaboration with the University of São Paulo. (AU)