Autor(es)

Silva, A. O. ; Kunzel, R. ; Yoshimura, E. M. ; Pires, K. C. C. ; Trindade, N. M.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 271, p. 6-pg., 2024-04-10.

Resumo

This paper reports for the first time the study of optically stimulated luminescence (OSL) of amorphous Brazilian bisphenol-A polycarbonate (Durolon) exposed to beta radiation. The OSL was studied from two perspectives: characterizing the luminescent signal as a function of radiation dose and examining repeatability. Computational analyses are applied to OSL curves via the deconvolution method. Fluorescence measurements employing the emission - excitation matrix (EEM) technique and optical absorption (OA) are incorporated to characterize the polymer defects and color centers. OSL measurements were carried out in a commercial reader Ris & oslash; (model DA20) coupled with a90Sr/90Y beta source. The sample was illuminated using 470 nm blue LEDs. The OSL response exhibited an exponential decay signal after 1 Gy, with linear dose-response and consistent repeatability. The continuous-wave-OSL curve was well adjusted with two distinct components. As result, Durolon promising potential as a luminescent dosimeter, supported by its desirable OSL signal characteristics. (AU)

• Processo FAPESP: 20/15626-6 - Estudo das propriedades ópticas e termoluminescentes de alexandritas brasileiras
• Beneficiário: Alexia Oliveira Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 19/05915-3 - Caracterização de minerais para dosimetria luminescente das radiações ionizantes
• Beneficiário: Neilo Marcos Trindade
• Modalidade de apoio: 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
• Modalidade de apoio: Auxílio à Pesquisa - Temático