PHONON SIDEBANDS IN EMISSION AND EXCITATION-SPECTRA FOR CE-3+ IN CAS

Emission and excitation spectra for Ce3+ in CaS have been observed at 75 K. They exhibit sharp phonon replicas due to pseudolocalized lattice vibrations. The observed frequencies of the pseudolocalized vibrations are 293 and 209 cm-1 in the emission spectra, and 282 and 206 cm-1 in the excitation spectra. Peak positions of the multiphonon background in the emission spectra depend upon the Ce concentration and preparation conditions, but the frequencies of the pseudolocalized vibrations remain unchanged. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.