https://doi.org/10.1140/epjp/s13360-025-06653-x
Regular Article
Thermoluminescent response of low-Z and heat-sensitive nanocrystalline NaLi2PO4:Dy3+ produced by solid state reaction method for gamma dosimetry
1
Department of Physics, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
2
Department of Physics, COMSATS University Islamabad (CUI), Lahore Campus, Pakistan
3
Department of Physics, University of Agriculture Faisalabad (UAF), Faisalabad, Pakistan
4
Head RDG (HPD), PINSTECH P.O. Nilore, Islamabad, Pakistan
Received:
25
January
2025
Accepted:
14
July
2025
Published online:
8
August
2025
Thermoluminescence dosimetric response of nanocrystalline powder samples of NaLi2PO4:Dy3+ (0.1 mol%) ions synthesized by the solid state reaction method (in air atmosphere) followed by a thermal annealing at 400 °C for 1 h was investigated. XRD revealed highly crystalline (60% crystallinity) orthorhombic structure yielding an average crystallite size of 23 nm (Scherer’s method) and 15 nm (Williamson–Hall method), respectively. SEM-induced surface morphology indicated irregular and self-oriented heavy clusters providing average particle size of 0.25 µm. Energy-dispersive X-ray spectroscopy (EDS) provided significant evidence of dysprosium (Dy) ions presence. Raman spectroscopy confirmed the vibrational modes of (PO4)3− group. UV–Vis spectroscopy confirmed the absorption band at 308 nm attributed to charge transfer transition of P-O. The radiation-interaction parameters, encompassing the attenuation coefficients and effective atomic numbers were theoretically evaluated. Samples were irradiated at various doses from Co-60 γ-source having dose rate 0.58 Gy/min. Thermoluminescence (TL) glow curve measured (at 10 °C /s) revealed main dosimetric peak at 233 °C. The TL kinetic parameters for the prepared nanoparticles were evaluated using Chen’s peak shape method. Synthesized nanophosphor showed good linearity up to 40 Gy. The results of the prepared nanophosphor revealed its significant potential for thermoluminescent dosimetric applications.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
