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Absorption Spectra of Rare Earths in Glasses

Abstract

ABSORPTION spectra of rare-earth ions have been increasingly studied over recent years because of their presentation of band and line absorption in the visible region. Much work has been carried out in both aqueous and non-aqueous solutions, with and without the presence of complexing ions, which demonstrates the influence of these complexing or hydrating ions upon the absorption spectrum and hence upon electron transitions involving the partially filled, lower-lying (4ƒ) electron shell to which the band absorption is attributable1. Few studies have, however, been reported upon variations in absorption spectra of rare-earth compounds in glassy compositions.

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