Spectroscopy of divalent rare earth ions in fluoride crystals
R. Shendrik, A. S. Myasnikova, E. A. Radzhabov, A. I. Nepomnyashchikh
TL;DR
This study investigates the absorption spectra of divalent rare earth ions in fluoride crystals, combining experimental measurements with theoretical calculations, revealing strong electron-phonon coupling and differences among crystal hosts.
Contribution
First calculation of Pr2+ absorption spectra in SrF2 crystals, aligning well with experimental data, and analysis of electron-phonon interactions in fluoride hosts.
Findings
Calculated spectra match experimental data
Strong electron-phonon coupling observed in Ce2+ ions
Absence of divalent Ce or Pr bands in BaF2
Abstract
We have studied the absorption spectra of x-ray irradiation-induced Ce2+ and Pr2+ ions in crystals of alkaline-earth fluorides. We have calculated absorption spectra of divalent praseodymium ions in SrF2 crystals doped with Pr2+ for the first time. The calculated spectra agree rather well with the experimental data. In crystals containing induced Ce2+ ions we have found strong electron-phonon coupling. In BaF2, we do not observe bands corresponded to divalent Ce or Pr ions.
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