Abstract

A model is presented for predicting the emission spectra of trivalent lanthanide ions in sites of tetragonal symmetry in fluorite-structure crystal hosts. The utility of the model is examined by comparing the results of the calculations performed with the experimental data for the Eu3+:SrF2 system. The a priori calculated energy-level scheme is found to reproduce the 14 experimentally observed crystal-field levels of the 7FJ multiplets of Eu3+ with a rms deviation of 24.5 cm−1. Reasonably accurate model predictions of most emission-line intensities can also be obtained by including contributions from electrostatic shielding, wave-function expansion, and a modified energy separation between the 4f configuration and the g symmetry perturbing states.

© 1988 Optical Society of America

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