Analysis of the absorption spectra 4fN+1to 4fN5d-6s of rare-earth ions in the cubic field. I. General formulae
- 14 October 1979
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 12 (19) , 4081-4093
- https://doi.org/10.1088/0022-3719/12/19/025
Abstract
In rare-earth ions incorporated in the crystal, the absorption bands within the 4fN+1 configuration are of free-ion type, except that they are slightly perturbed by the Stark effect caused by the crystal field. On the other hand, the transitions 4fN+1 to 4fN5d show broad absorption bands, since the 5d orbit is strongly affected by the crystal field. Furthermore, the transitions 4fN+1 to 4fN6s caused by the configuration interaction between 4fN5d and 6s orbits. In this paper, the elements of the energy matrix of the 4fN5d-6s system in the cubic field and the general formula for the shape of the absorption spectra 4fN+1 to 4fN5d-6s are calculated.Keywords
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