Observation of the two-hole satellite in Cr and Fe metal by resonant photoemission at the 2p absorption energy

Valence-band spectra of Cr and Fe metal were measured with photon energies around their respective $2p$ energies. An Auger signal is found to be superimposed on the valence-band photoemission signal for photon energies at and above the $2p$ absorption energy, but also for excitation energies down to ~4 eV below the $2p$ absorption energy. This is the radiationless resonance Raman (resonant Raman Auger) regime and gives rise to a signal that is equivalent, in terms of the final state, to the 6 eV satellite in Ni with energies at 3.5 eV below EF in Cr and 3.2 eV below EF in Fe.