Highlights
- Optically Stimulated Luminescence (OSL) of bisphenol-A polycarbonate (Durolon) was investigated;
- Durolon presented a fast exponential decay curve, linear dose-response and a repeatable signal;
- It was possible to describe the OSL curves with 2 components with the parameters well-established;
- Durolon showed prominent results to act as an ionizing radiation detector.
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 Risø (model DA-20) 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.
