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

• Grant number: 19/22375-2
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): December 01, 2019
• Effective date (End): November 30, 2020
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal researcher: Neilo Marcos Trindade
• Grantee: Juan Matheus Munoz
• Home Institution: Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP). Campus São Paulo. São Paulo , SP, Brazil

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)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MUNOZ, J. M.; LIMA, L. S.; YOSHIMURA, E. M.; JACOBSOHN, L. G.; TRINDADE, N. M. OSL response of alpha-Al2O3:C, Mg exposed to beta and UVC radiation: A comparative investigation. Journal of Luminescence, v. 236, AUG 2021. Web of Science Citations: 0.

TRINDADE, N. M.; SILVA, E. P.; NUNES, M. C. S.; MUNOZ, J. M.; SANTOS, J. C. A.; YOSHIMURA, E. M.; SILVA, R. S. Synthesis and thermoluminescence properties of MgAl2O4:Ca laser-sintered ceramics. Optical Materials, v. 108, OCT 2020. Web of Science Citations: 0.