Abstract
Electronic absorption spectra of erbium and dysprosium acetate single crystals were measured. Tle intensities of 4f-4f transitions were calculated and the Judd-Ofelt Ωλ parameters evaluated. Heavy lantllanide acetates differ from other lanthanide carboxylate compounds by relatively high hypersensitive transition intensities and the 12 parameters. These results are discussed in terms of a stronger polarization effect which can be explained by the distinctly shorter Ln—OH 2 bond in comparison with the Ln-OOC bond in the investigated system. DACS numbers: 78.20.Wc, 81.40.Tv
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