Caracterização de uma leitora por luminescência opticamente estimulada utilizando dosímetros de BeO

Abstract

Optically stimulated luminescence (OSL) dosimetry consists of a technique where crystals, after being irradiated and optically stimulated, emit light. This property has been extensively studied and has shown to be very promising for personal dosimetry. Beryllium oxide (BeO) is a material that has the necessary properties to be used as an OSL dosimeter, so it is important to analyze its behavior with different beam intensities in order to analyze the behavior of the material. A new LOE reader, called LumiDeteck 3000, developed by the Federal University of Pernambuco, was evaluated using BeO dosimeters with doses from 0.1 Gy to 10 Gy. The lower limit of detection calculated for the reader was 0.19 Gy, the reproducibility was not satisfactory, exceeding the suggested limit. The dose-response curve showed a linear behavior, as expected, despite the relatively large uncertainties due to low reproducibility. However, it should be noted that the OSL reader works very well for other dosimeters, showing this behavior for the material used in this study.