Abstract
We report on an angle-resolved resonant photoemission study of Co and Fe metal at the ${M}_{\mathrm{III}}$ absorption threshold. The intensity of the various spectral components was measured as a function of the electron emission angle relative to the E vector of the incident light. On ${M}_{\mathrm{III}}$ resonance, the main valence-band photoemission (PE) intensity of Co and Fe metal, located between ${E}_{F}$ and 3 eV, follows a ${\mathrm{cos}}^{2}\ensuremath{\theta}$ behavior, as is expected for a photoemission process. However, the intensity of the enhanced feature located at $\ensuremath{\approx}5$ eV is found to be almost independent of the emission angle, as expected for an incoherent Auger process. This clearly shows that the enhancement of the 5 eV PE signal is mainly caused by an incoherent Auger decay and not by a resonant PE process.
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