Correlation between thermoluminescence and optically stimulated luminescence responses of natural alexandrite

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Applied Radiation and Isotopes; v. 166, DEC 2020.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 19/05915-3 - Caracterização de minerais para dosimetria luminescente das radiações ionizantes
• Beneficiário: Neilo Marcos Trindade
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/05982-0 - P&D&I em metrologia das radiações na área da saúde
• Beneficiário: Linda Viola Ehlin Caldas
• Linha de fomento: Auxílio à Pesquisa - Temático