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- W2386051212 abstract "Series of niobate-phosphate and niobate-silicate glasses doped with Eu 3+ ions were prepared. The emission, phonon-side band spectra and fluorescence lifetimes of these glasses were studied and the intensity parameters Ω 2 of Eu 3+ were obtained. The temperature-dependence of emission intensity of the Eu 3+-ion in these niobate glasses was investigated. The temperature-quenching rates were determined. The results indicate that in niobate glasses, as the concentration of Nb 2O 5 increases, the covalence becomes strong, the symmetry becomes low and the electron-phonon coupling strength becomes strong, thus the lifetimes become short, the nonradiative transition processes and the temperature-quenching become strong. The temperature-dependent behavior of the Eu 3+ ion was studied in various niobate glasses. The variation of the emission intensity of Eu 3+ with temperature was attributed to two factors, the thermally excited emission from 7F 2 to 5D 2 and the temperature-quenching effect. The former tends to cause the intensity of Eu 3+ increase with temperature, while the later tends to cause the intensity decrease. The temperature-quenching rates in various glasses were obtained. They increase with the increasing concentration of Nb 2O 5. The temperature-dependencies of the peak energies and the line widths of 5D 0→ 7F J(J=0,1) were experimentally determined." @default.
- W2386051212 created "2016-06-24" @default.
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- W2386051212 date "2003-01-01" @default.
- W2386051212 modified "2023-09-25" @default.
- W2386051212 title "Fluorescence Properties of Trivalent Europium Doped in Various Niobate Codoped Glasses" @default.
- W2386051212 hasPublicationYear "2003" @default.
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