X-ray fluorescence spectra of metals excited below threshold

Details X-ray fluorescence spectra of metals excited below threshold X-ray fluorescence spectra of metals excited below threshold

2012-01-03

arxiv.org/abs/1201.0612v1

Physical Review B 68, 045119 (2003)

Physics

Condensed Matter

Materials Science

10 pages, 3 figures, http://link.aps.org/doi/10.1103/PhysRevB.68.045119

Scientific paper

10.1103/PhysRevB.68.045119

X-ray scattering spectra of Cu and Ni metals have been measured using monochromatic synchrotron radiation tuned from far above to more than 10 eV below threshold. Energy conservation in the scattering process is found to be sufficient to explain the modulation of the spectral shape, neglecting momentum conservation and channel interference. At excitation energies close to and above threshold, the emission spectra map the occupied local partial density of states. For the sub-threshold excitations, the high-energy flank of the inelastic scattering exhibits a Raman-type linear dispersion, and an asymmetric low energy tail develops. For excitation far below threshold the emission spectra are proportional to a convolution of the occupied and unoccuppied local partial densities of states.

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