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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Thermoluminescence of UV-irradiated alpha-Al2O3 :C,Mg

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Trindade, N. M. [1, 2] ; Magalhaes, M. G. [2] ; Nunes, M. C. S. [2] ; Yoshimura, E. M. [1] ; Jacobsohn, L. G. [3]
Total Authors: 5
[1] Univ Sao Paulo, Inst Phys, Sao Paulo, SP - Brazil
[2] Fed Inst Educ Sci & Technol Sao Paulo, Dept Phys, Sao Paulo, SP - Brazil
[3] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC - USA
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 223, JUL 2020.
Web of Science Citations: 0

The effects of ultraviolet (UV) radiation exposure on the thermoluminescence (TL) of aluminium oxide co-doped with carbon and magnesium (Al2O3:C,Mg) are reported. An Al2O3:C,Mg single crystal was investigated as a potential UV TL dosimeter after exposure to a Hg lamp radiation. The TL peak intensity and area under the curve signals were investigated as a function of the UV exposure time. Intense TL signal was obtained after UV radiation, and the area of the main TL peak at 456 K exponentially increasing with UV exposure time (within 10-120 s), with a trend for saturation for long irradiation times These results were interpreted against similar measurements using beta radiation, showing that the same defects are involved in the TL response for both types of radiation, while the different irradiation response to the two types of radiation was related to the differences in the energy dissipation characteristics, and how they affect the concentration of F-type/F-aggregate centers. (AU)

FAPESP's process: 19/05915-3 - Characterization of minerals for luminescent dosimetry of ionizing radiations
Grantee:Neilo Marcos Trindade
Support Opportunities: Regular Research Grants
FAPESP's process: 19/00942-2 - Study of thermally and optically stimulated luminescence of Al2O3:C,Mg for UV radiation
Grantee:Maicon Gois Magalhães
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 18/16894-4 - Investigation of optically stimulated luminescence of alexandrite pellets for applications in the dosimetry area
Grantee:Matheus Cavalcanti dos Santos Nunes
Support Opportunities: Scholarships in Brazil - Scientific Initiation