Study of thermally and optically stimulated luminescence of Al2O3:C,Mg for UV radiation

• Grant number: 19/00942-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2019
• End date: April 30, 2020
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal Investigator: Neilo Marcos Trindade
• Grantee: Maicon Gois Magalhães
• Host Institution: Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP). Campus São Paulo. São Paulo , SP, Brazil

Abstract

In this research, we propose to investigate the effects of UV radiation on crystals of aluminum oxide doped with carbon and magnesium (Al2O3:C,Mg) using the Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) techniques. Al2O3:C,Mg is a material known, because of its application, as fluorescent nuclear track detectors (FNTD). Recent studies show that these crystals exhibit the intensity of their main TL peak (~ 160 C), as well as the intensity of the OSL decay curve, in proportion to a wide range of ionizing radiation (beta or gamma) doses to which they were previously exposed. Although FNTDs have been heavily investigated to perform in clinical dosimetry, there are no reports on applications in environmental dosimetry, for example, monitoring of UV radiation. In fact, since UV radiation is harmful and may be carcinogenic, it is necessary to investigate new materials with sensitivity to UV radiation. Therefore, this work will analyze the shape and intensity of the TL and OSL curve of Al2O3: C, Mg as a function of times of exposure to UV radiation, and investigate the kinetic behavior of the TL peak; obtaining data such as energy and frequency factor. Thus, it is intended to contribute with knowledge of this new material in the area of dosimetry, especially in relation to sensitivity to UV radiation. The research will be conducted in collaboration with the University of São Paulo.

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)

TRINDADE, N. M.; MAGALHAES, M. G.; NUNES, M. C. S.; YOSHIMURA, E. M.; JACOBSOHN, L. G.. Thermoluminescence of UV-irradiated alpha-Al2O3 :C,Mg. Journal of Luminescence, v. 223, JUL 2020. (19/05915-3, 19/00942-2, 18/16894-4)