Iranian Journal of Physics Research

Synthesis and study of thermoluminescence and photoluminescence properties of dysprosium -doped alumina nanoparticles under gamma irradiation

Document Type : Original Article

Authors

Mina Bagheri 1
Ehsan Sadeghi 2
Mostafa Zahedifar 2

1 Physics Department, University of Kashan, Kashan, Iran

2 -Physics Department, University of Kashan, Kashan, Iran -Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran

https://doi.org/10.47176/ijpr.25.4.22058
Abstract
This study investigates the dosimetric properties of alumina-based phosphor doped with dispersium impurity, evaluating its potential as 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 analyzed using energy-dispersive X-ray spectroscopy (EDS). The kinetic parameters of the thermoluminescence (TL) glow curve were extracted through computer-based curve fitting. The TL glow curve exhibited two overlapping peaks at approximately 394 K and 449 K. Additional analyses of the glow curve characteristics, fading characteristics, and dose-response linearity demonstrated the strong potential of this nanophosphor as a high-sensitivity TL dosimeter suitable for high-dose radiation measurements.

Keywords

TL
α-Al2O3
Kinetic parameters
Dysprosium
Thermoluminescence glow curve
Subjects
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