Correlation between thermoluminescence and optically stimulated luminescence responses of natural alexandrite

Author(s)

Trindade, N. M. ^{[1, 2]} ; Cruz, M. R. ^[2] ; Yoshimura, E. M. ^[2]

Affiliation

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

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

• Document type: Journal article
• Source: Applied Radiation and Isotopes; v. 166, DEC 2020.
• Web of Science Citations: 0

Abstract

Luminescent properties of alexandrite crystals (BeAl2O4:Cr3+) are studied. Partial readouts of thermoluminescence (TL) and optically stimulated luminescence (OSL) signals were obtained to infer the relations of OSL and TL trapping centers. Four TL peaks were studied; their intensities decrease at different rates by illumination with blue OSL light. The OSL curve shows two-time components (exponential decay constants 3.15 and 28.4 s). The short time component is preferentially diminished when the sample is heated to temperatures from 363 to 513 K. About 50% of the whole TL intensity remains after a complete 300s OSL readout. (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: 18/05982-0 - R&D&I in radiation metrology in the health area
• Grantee: Linda Viola Ehlin Caldas
• Support Opportunities: Research Projects - Thematic Grants