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- W2029576198 abstract "<i></i>Optical absorption of <i>Eu</i><SUP>3+</SUP> and <i>Eu</i><SUP>2+</SUP> ions in the polycrystalline europium oxides and fluorides was studied by the diffuse reflectance spectroscopy method. For all europium compounds, characteristic narrow peaks of 4<i>f</i>-4<i>f</i> electron transitions are observe. Their positions are rather independent upon the type of a compound. However, their intensity and number significantly vary, especially from the transition oxides to fluorides. In addition to those, shoulders of fundamental absorption in the oxide <i>R</i><SUB><i>d</i></SUB>- spectra of the oxide materials arise. Substitution of Eu<SUP>2+</SUP> ions for <i>Eu</i><SUP>3+</SUP> ions in the EuF<SUB>3</SUB> - lattice causes a sharp change of the spectral characteristics. It is accompanied by an appearance of the wide band due to 4<i>f</i>-5<i>d</i>-electron transitions." @default.
- W2029576198 created "2016-06-24" @default.
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- W2029576198 date "2002-07-12" @default.
- W2029576198 modified "2023-09-23" @default.
- W2029576198 title "Optical absorption of Eu3+and Eu2+in europium oxides and europium fluorides" @default.
- W2029576198 doi "https://doi.org/10.1117/12.475346" @default.
- W2029576198 hasPublicationYear "2002" @default.
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