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• W2090972490 abstract "Glasses with composition 50GeO2–(50−x)PbO–5PbF2–xLnF3 (Ln = Pr3+–Yb3+) were prepared from commercial raw materials. The content of PbF2 was constant and amounted to 5 mol% whereas the concentration of luminescent ions was diverse (0.2 and 2 mol%). Thermal stability of the glasses were monitored by differential thermal analysis (DTA). It has been found that increase of rare-earth fluoride content from 0.2 mol% to 2 mol% brings about a shift of the glass crystallization onset from 450 °C to 487 °C for Nd-doped samples and from 466 °C to 482 °C for Tm-doped samples. Optical absorption and emission spectra of Ln active ions in oxyfluoride glass have been investigated at room temperature in the ultraviolet (UV), visible (VIS) and near-infrared (NIR) region. Oscillator strengths, phenomenological Judd–Ofelt intensity parameters Ω2,4,6, radiative transition probabilities, branching ratios and radiative lifetimes of luminescent levels have been estimated. Analysis of decay curves of luminescence revealed that the increase of rare-earth fluoride content from 0.2 mol% to 2 mol% shortens the lifetime of the 4F3/2 level of Nd3+ from 224 μs to 90 μs." @default.
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• W2090972490 date "2008-01-01" @default.
• W2090972490 modified "2023-10-06" @default.
• W2090972490 title "Systematic study of spectroscopic properties and thermal stability of lead germanate glass doped with rare-earth ions" @default.
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• W2090972490 doi "https://doi.org/10.1016/j.jnoncrysol.2007.07.056" @default.
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