Optically stimulated luminescence of Durolon polycarbonate

Author(s)

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

• Document type: Journal article
• Source: Journal of Luminescence; v. 271, p. 6-pg., 2024-04-10.

Abstract

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)

• FAPESP's process: 20/15626-6 - Study of the optical and thermoluminescent properties of Brazilian alexandrites
• Grantee: Alexia Oliveira Silva
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 19/05915-3 - Characterization of minerals for luminescent dosimetry of ionizing radiations
• Grantee: Neilo Marcos Trindade
• Support Opportunities: 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 Opportunities: Research Projects - Thematic Grants