Document Type : Original Article
Authors
1 Physics Department, University of Kashan, Kashan, Iran
2 University of kashan
Abstract
This study investigates the dosimetric properties of alumina-based phosphor doped with dispersium impurity, evaluating its potential as a highly sensitive thermoluminescent material for high-dose applications. All samples were synthesized using the sol-gel method. The highest sensitivity to gamma radiation from a 60Co source was observed in the sample with 0.5 mol% dispersium doping. The structural and morphological properties of the particles were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM), while elemental analysis of the α-alumina sample was performed using energy-dispersive X-ray spectroscopy (EDS). The kinetic parameters of the thermoluminescence (TL) glow curve were determined through computer-based curve fitting. The TL glow curve revealed two overlapping peaks at approximately 394 K and 449 K. Additional analyses of the glow curve characteristics, fading behavior, and dose-response linearity demonstrated the strong potential of this nanophosphor as a high-sensitivity TL dosimeter suitable for high-dose radiation measurements.
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