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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.)

Characterization of the optically stimulated luminescence (OSL) response of beta-irradiated alexandrite-polymer composites

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Nunes, M. C. S. [1] ; Lima, L. S. [2] ; Yoshimura, E. M. [2] ; Franca, L. V. S. [3] ; Baffa, O. [3] ; Jacobsohn, L. G. [4] ; Malthez, A. L. M. C. [5] ; Kunzel, R. [6] ; Trindade, N. M. [2, 1]
Total Authors: 9
[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] Univ Sao Paulo, FFCLRP, Dept Phys, Ribeirao Preto, SP - Brazil
[4] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC - USA
[5] Univ Tecnol Fed Parana, Dept Phys, Curitiba, PR - Brazil
[6] Univ Fed Sao Paulo, Dept Phys, Diadema, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Journal of Luminescence; v. 226, OCT 2020.
Web of Science Citations: 0

Alexandrite mineral (BeAl2O4:Cr3+) powder incorporated in a fluorinated polymer was prepared in the form of pellets. A mixture with 20 wt% of the alexandrite in the pellet had the luminescence behavior evaluated as a function of exposure to ionizing radiation using the optically stimulated luminescence (OSL) technique. The OSL measurements were evaluated in terms of dose-response (beta dose from 0.1 to 5 Gy), repeatability, reproducibility, and fading. The results showed that the OSL intensity signal varied linearly with the irradiation dose and that the OSL intensity suffered a strong reduction during the first five days of storage in the dark but remained stable for at least the following 30 days. Radioluminescence (RL) measurements under X-ray excitation revealed a weak luminescence within the ultraviolet-visible spectral region, while optical absorption (OA) measurements revealed the presence of Cr3+ impurities. (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: 18/05982-0 - R&D&I in radiation metrology in the health area
Grantee:Linda Viola Ehlin Caldas
Support type: Research Projects - Thematic Grants
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 type: Scholarships in Brazil - Scientific Initiation