Photon–glass interactions in praseodymium (III, IV) oxide nanoparticle-modified tellurite glasses: structural and shielding correlations
Source abstract
Abstract
This study aimed to investigate the changes in physical, optical and gamma radiation shielding properties by incorporating Pr6O11 nanoparticles (nps) into zinc-tellurium oxyfluoride (TeO2-ZnO-ZnF2) glass composition, which has not been studied before. Four doped and undoped glasses were synthesized by melt-quenching method by adding 0,1,3, and 5 mol% Pr6O11(np) nanoparticles to 70%TeO2-15%ZnO-15%ZnF2 structure. Structural, optical and gamma radiation shielding properties of synthesized glasses were characterized by XRD, UV-Vis spectroscopy and Phy-X/PSD program. XRD analyses showed that glasses were amorphous and Pr6O11(np) additive did not cause crystallization. Density increased from 5.496 to 5.663 g/cm(3) and molar volume increased from 25.3688 to 32.4091 cm(3)/mol with increasing Pr6O11(np) concentration. This situation revealed an expansion in the network structure and an increase in density. Optical analysis showed that the doped glasses exhibited absorption peaks specific to Pr3+ ions in the range of 449-1017 nm, and the optical band gap of the glasses decreased from 3.121 to 2.690 eV depending on the doping ratio. Urbach energy increased from 0.172 to 0.252 eV, indicating that structural order was disrupted, and decreased at high concentrations, indicating that the structure started to re-order. Radiation shielding properties were characterized with the parameters of mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half-value layer (HVL) and effective atomic number (Z(eff)). MAC increased from 53.51 to 54.88 cm(2)/g at 0.015 MeV, LAC increased from 294.12 to 310.78 cm(-1) and HVL decreased from 0.0024 to 0.0022 cm(-1), indicating that Pr6O11(np) doping improved the shielding performance by enhancing photoelectric interactions at low energies. At high energies, the differences due to Compton scattering and pair production decreased. EBF and EABF values decreased with Pr6O11(np), confirming the suppression of secondary radiation. In conclusion, Pr6O11(np) doping improves both the optical and radiation shielding properties of zinc-tellurium oxyfluoride glasses, offering potential for nuclear security and optoelectronic applications.
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