On the vibronic spectrum of rare earths in calcium fluoride
CANADIAN JOURNAL OF PHYSICS(2011)
Abstract
The phonon side-band peak near 490 cm −1 accompanying 4f → 5d transitions of ten triply-ionized rare earth elements in the CaF 2 matrix and some of the corresponding peaks in SrF 2 and BaF 2 are investigated. All the data taken together confirm an earlier identification of the peaks as a local mode associated with the rare earth ion and its nearest-neighbour fluorine ions.
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spectrum
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