Nickel doped magnesium oxide nanoparticles: synthesis, characterization, and thermoluminescence dosimetry features in gamma irradiation

چکیده مقاله

The novel Ni-doped magnesium oxide nanoparticles were synthesized using the co-precipitation technique and optimized across various dopant concentrations and annealing conditions. Unlike previous studies, this work systematically investigates the influence of Ni concentration and thermal treatment on thermoluminescence (TL) properties of the synthesized MgO: Ni nanoparticles. The crystalline properties, morphology, composition, and structure of the fabricated samples were characterized. XRD analysis revealed a pure cubic MgO phase with crystallite sizes below 50 nm. After 20 Gy gamma irradiation, the sample doped with 1 mol% Ni and annealed at 700 C exhibited the highest integrated TL signal. The material showed a linear gamma dose response up to 1000 Gy and excellent signal stability over 30 days. Kinetic parameters were determined using curve fitting based on a general-order kinetic model. These findings highlight the potential of MgO: Ni nanoparticles as efficient phos phor for high dose dosimetry.