Radiation dosimeter utilizing optically stimulated luminescence of BeO:Na,Tb,Gd ceramics

Abstract

This paper presents a systematic study of a new Optically Stimulated Luminescence (OSL) dosimeter based on BeO:Na,Tb,Gd ceramics synthesized using precipitation method. We confirm the product performing X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS) analyzes. Luminescence signals are characterized by Thermoluminescence (TL), Radioluminescence (RL), and OSL techniques. BeO:Na,Tb,Gd ceramics have two TL peaks located at ∼180 and 370 °C associated with the OSL signals. Thermal quenching energies were evaluated as 0.52 eV using the OSL signals obtained at various readout temperatures and 0.55 eV using TOSL method. The results demonstrate that the OSL signals of BeO:Na,Tb,Gd ceramics with high sensitivity, dose linearity, low-fading, reusability, and thermal stability are very encouraging and convenient for medical applications.