Synthesis and thermoluminescence characterization of β-irradiated MgB4O7 phosphor co-doped with Dy and Na

Abstract

This study presents the successful synthesis of Dy and Na co-doped polycrystalline MgB₄O₇ phosphor via solid-state synthesis, followed by its thermoluminescence (TL) characterization after β-irradiation. The crystal structure of the synthesized phosphor was confirmed through X-ray diffraction (XRD) analysis. The vibrational frequencies of the atomic/ionic bonds in the crystal lattice were examined using Fourier Transform Infrared (FT-IR) spectroscopy, while Scanning Electron Microscopy (SEM) was employed to investigate the morphological features of the MgB₄O₇:Dy,Na compound. Transmission Electron Microscopy (TEM) analysis was conducted to observe the structural characteristics and homogeneity in MgB₄O₇:Dy,Na. Furthermore, the thermoluminescence behavior of the phosphor was thoroughly assessed, revealing a TL glow curve comprising at least four distinct peaks, with the main dosimetric peak observed at approximately 200 °C. Repeatability and fading analyses indicate that this phosphor holds significant potential for application in radiation dosimetry under β-irradiation.