Resonant Raman X-Ray Scattering: New Directions

Raman and Resonant Raman x-ray scattering are briefly reviewed. Two recent contributions to the field of resonant Raman x-ray scattering are then described. In the first Resonant Raman x-ray scattering on molybdenum was studied. Beside the usual resonant Raman peak corresponding to the fluorescent KΑ lines another peak with a smaller energy loss was found. It is attributed to resonant Raman scattering with a final state M-shell vacancy corresponding to the fluorescent Kß lines. Both peaks are shown to be independent of the scattering angle. Absolute cross sections have been determined and compared with theoretical predictions. In the second contribution, widths of K vacancy excited states are extracted by measuring the ratio of cross sections for x-ray fluorescence and resonant Raman scattering. Widths of K-vacancy excited states in Zr, Mo, Rh, Ag, and Sn were determined as (4.0 ± 0.3) eV, (4.6 ± .3) eV, (6.4 ± .5) eV, (7.6 ± .7) eV and (12.0 ± 1.5) eV respectively.