%0 Journal Article
%K raman
%K raman scattering
%K raman-scattering
%K scattering
%K intensities
%K intensity
%A P C Becker
%A Norman E Edelstein
%A G M Williams
%A Jerome J Bucher
%A Richard E Russo
%A J. J Arnold Koningstein
%A Lynn A Boatner
%A Marvin M Abraham
%B Physics Review B
%D 1985
%F Laser
%G eng
%N 12
%P 8102-8110
%R 10.1103/PhysRevB.31.8102
%T Intensities and asymmetries of electronic Raman scattering in Thulium and Erbium phosphate
%V 31
%8 06/1985
%X <p>An investigation of the low-temperature electronic Raman scattering spectra of ErPO<sub>4</sub> and TmPO<sub>4</sub> has been carried out. The experimental intensities have been compared with the standard second-order theory of two-photon processes for both intermultiplet and intramultiplet transitions between individual crystal-field levels. Adequate agreement is found in the case of ErPO<sub>4</sub>, but serious discrepancies exist for TmPO<sub>4</sub>. It is shown that electronic Raman scattering is a sensitive technique for testing the Judd-Ofelt–type theories of two-photon processes in rare-earth crystals. Strong asymmetry, a characteristic feature of electronic Raman scattering, has been observed in several of the transitions.</p>