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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.)

Fabrication and characterization of a composite dosimeter based on natural alexandrite

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Trindade, Neilo Marcos [1, 2] ; Metidieri Cruz Malthez, Anna Luiza [3] ; Nascimento, Augusto de Castro [1] ; da Silva, Ronaldo Santos [4] ; Jacobsohn, Luiz Gustavo [2] ; Yoshimura, Elisabeth Mateus [5]
Total Authors: 6
[1] Fed Inst Educ Sci & Technol Sao Paulo, Dept Phys, Sao Paulo, SP - Brazil
[2] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC - USA
[3] Univ Tecnol Fed Parana, Curitiba, PR - Brazil
[4] Univ Fed Sergipe, Sao Cristovuo, SE - Brazil
[5] Univ Sao Paulo, Inst Phys, Sao Paulo, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Optical Materials; v. 85, p. 281-286, NOV 2018.
Web of Science Citations: 1

This work aims at demonstrating the fabrication of a new composite material based on the micron-sized powder of the alexandrite mineral (BeAl2O4:Cr3+) dispersed in a fluorinated polymer for OSL dosimetric applications. Composites with 50 wt% alexandrite powders were obtained and characterized in their chemical composition, mechanical, and luminescent properties. Energy dispersive X-ray spectroscopy mapping measurements of the pellets revealed a homogeneous distribution of alexandrite particles throughout the organic matrix. PL measurements showed the signal related to Cr3+ ions in alexandrite remained active besides all fabrication steps, and tensile tests showed the pellets to have good ductility and tensile strength. The OSL results showed the integrated intensity signal varied linearly with the beta irradiation dose and that the pellets were stable at room temperature over time of 28 days. Nevertheless, improvements in the fabrication process are necessary toward obtaining the same OSL intensity from different pellets. (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