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Investigation of optically stimulated luminescence of alexandrite pellets for applications in the dosimetry area

Grant number: 18/16894-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2018
Effective date (End): December 31, 2020
Field of knowledge:Engineering - Nuclear Engineering - Applications of Radioisotopes
Principal Investigator:Neilo Marcos Trindade
Grantee:Matheus Cavalcanti dos Santos Nunes
Home Institution: Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP). Campus São Paulo. São Paulo , SP, Brazil

Abstract

Alexandrite has a chrysoberyl type structure with the incorporation of chromium in its lattice, chemical composition BeAl2O4: Cr3+ and contains around of 20 wt.% BeO and 80 wt.% Al2O3. Since these two oxides are commercially used as dosimeters, alexandrite has the potential to be a dosimeter too. Currently, Brazil one of the largest producers of this mineral. The objective of the research is to investigate the effects of beta ionizing radiation in alexandrite using Optically Stimulated Luminescence (OSL) technique. Preliminary results for alexandrite mineral presented a linear relationship of OSL intensity (stimulated with blue LEDs) as a function of beta dose, homogeneity in OSL results for different samples and low fading. In this work, it is proposed the development and characterization of natural alexandrite mineral pellets mixed with fluorinated polymer as a proposal for radiation detectors. The research will be conducted in collaboration with the University of Sao Paulo and Federal University of Technology - Parana.

News published in Agência FAPESP Newsletter about the scholarship:
Aluminum oxide crystal tested as a UV radiation sensor 
Articles published in other media outlets (15 total):
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Comercial Pyramon Studio Light Ltda: Brasileiros desenvolvem cristal que mede radiação UV (07/Dec/2020)
Technology Networks (Reino Unido): Doped Aluminum Oxide Shows Promise as a UV Radiation Detector (05/Jun/2020)
Phys.Org (Reino Unido): Aluminum oxide crystal tested as a UV radiation sensor (03/Jun/2020)
Technology Networks (Reino Unido): Doped Aluminum Oxide Shows Promise as a UV Radiation Detector (03/Jun/2020)
AZoSensors (Reino Unido): Carbon-Doped Aluminum Oxide Could Serve as UV Radiation Sensor (03/Jun/2020)
Occupy Independents (EUA): Aluminum Oxide Crystal Tested As A UV Radiation Sensor (03/Jun/2020)
News Medical (Austrália): Researchers test aluminum oxide crystal as a UV radiation sensor (02/Jun/2020)
Bioengineer (Reino Unido): Aluminum oxide crystal tested as a UV radiation sensor (02/Jun/2020)
Science Codex: Aluminum oxide crystal tested as a UV radiation sensor (02/Jun/2020)
Scienmag Science Magazine (Reino Unido): Aluminum oxide crystal tested as a UV radiation sensor (02/Jun/2020)
7thSpace: Aluminum oxide crystal tested as a UV radiation sensor (02/Jun/2020)
Knowledia (França): Researchers test aluminum oxide crystal as a UV radiation sensor (02/Jun/2020)
Inovação Tecnológica: Brasileiros desenvolvem cristal que mede radiação UV (29/Apr/2020)
Espaço Ecológico no Ar: Cristal de óxido de alumínio é testado como sensor de radiação UV (29/Apr/2020)
Revista Analytica online: Cristal de óxido de alumínio é testado para uso como sensor de radiação de UV (28/Apr/2020)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
TRINDADE, N. M.; SILVA, E. P.; NUNES, M. C. S.; MUNOZ, J. M.; SANTOS, J. C. A.; YOSHIMURA, E. M.; SILVA, R. S. Synthesis and thermoluminescence properties of MgAl2O4:Ca laser-sintered ceramics. Optical Materials, v. 108, OCT 2020. Web of Science Citations: 0.
NUNES, M. C. S.; LIMA, L. S.; YOSHIMURA, E. M.; FRANCA, L. V. S.; BAFFA, O.; JACOBSOHN, L. G.; MALTHEZ, A. L. M. C.; KUNZEL, R.; TRINDADE, N. M. Characterization of the optically stimulated luminescence (OSL) response of beta-irradiated alexandrite-polymer composites. Journal of Luminescence, v. 226, OCT 2020. Web of Science Citations: 0.
TRINDADE, N. M.; MAGALHAES, M. G.; NUNES, M. C. S.; YOSHIMURA, E. M.; JACOBSOHN, L. G. Thermoluminescence of UV-irradiated alpha-Al2O3 :C,Mg. Journal of Luminescence, v. 223, JUL 2020. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.