OSL response of alpha-Al2O3:C, Mg exposed to beta and UVC radiation: A comparative investigation

Author(s)

Munoz, J. M. ^[1] ; Lima, L. S. ^[2] ; Yoshimura, E. M. ^[2] ; Jacobsohn, L. G. ^[3] ; Trindade, N. M. ^{[2, 1]}

Affiliation

^[1] Fed Inst Educ Sci & Technol Sao Paulo, Dept Phys, Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Inst Phys, Sao Paulo, SP - Brazil

^[3] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC - USA

• Document type: Journal article
• Source: Journal of Luminescence; v. 236, AUG 2021.
• Web of Science Citations: 0

Abstract

Continuous wave optically stimulated luminescence (CW-OSL) of an Al2O3:C, Mg single crystal was investigated after irradiation with ultraviolet C radiation (UVC; peak emission at 254 nm) as well as with a beta source under different doses (100 mGy - 3 Gy). Analysis of the OSL decay curves provided experimental evidence that: i) UVC-and beta-irradiated Al2O3:C, Mg single crystal showed similar OSL decay curves, and that ii) a same fast (tau similar to 2.9 s) and a same slow (tau similar to 29 s) components were identified in the OSL decay curves for both types of radiation. On the other hand, analysis of the results suggested that radiation type generated distinct initial concentration of charges trapped at these two traps. The differences in the OSL decay curves were attributed either to differences in the initial population of the traps or to a balance of trapping-detrapping during UV irradiation. (AU)

• FAPESP's process: 19/05915-3 - Characterization of minerals for luminescent dosimetry of ionizing radiations
• Grantee: Neilo Marcos Trindade
• Support type: Regular Research Grants
• FAPESP's process: 19/22375-2 - Study of kinetic parameters of thermoluminescent peaks of Al2O3:C,Mg
• Grantee: Juan Matheus Munoz
• Support type: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 18/05982-0 - R&D&I in radiation metrology in the health area
• Grantee: Linda Viola Ehlin Caldas
• Support type: Research Projects - Thematic Grants