Thermoluminescence and radioluminescence of alpha-Al2O3:C,Mg at high temperatures

Author(s)

Trindade, Neilo Marcos ^{[1, 2]} ; Jacobsohn, Luiz Gustavo ^[2]

Affiliation

^[1] Fed Inst Educ Sci & Technol Sao Paulo, Dept Phys, BR-0110910 Sao Paulo, SP - Brazil

^[2] Clemson Univ, Dept Mat Sci & Engn, 515 Calhoun Dr, Sirrine Hall 161, Clemson, SC 29634 - USA

• Document type: Journal article
• Source: Journal of Luminescence; v. 204, p. 598-602, DEC 2018.
• Web of Science Citations: 2

Abstract

A alpha-Al2O3:C,Mg single crystal was investigated by means of optical absorption and photoluminescence measurements aimed at the identification of defects involved in the luminescence process. It was also investigated by thermoluminescence (TL) measurements as a function of the spectral emission in the 1.7-5.0 eV range. Radioluminescence measurements under X-ray excitation as a function of the temperature, from room temperature up to 400 degrees C were executed. These measurements revealed the presence of F, F-type, F-aggregate, and Mg-perturbed F-type and F-aggregate centers, and their thermal quenching behavior. Further, the role of these defects as recombination centers in the TL process was revealed. (AU)

• FAPESP's process: 17/11663-1 - Study of a new natural detector for applications in the health and industry field
• Grantee: Neilo Marcos Trindade
• Support Opportunities: Scholarships abroad - Research