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 superim posed on the valence-band photoemission signal for photon energies at and a bove the 2p absorption energy, but also for excitation energies down to sim ilar to 4 eV below the 2p absorption energy. This is the radiationless reso nance Raman (resonant Raman Auger) regime and gives rise to a signal that i s equivalent, in terms of the final state, to the 6 eV satellite in Ni with energies at 3.5 eV below E-F in Cr and 3.2 eV below E-F in Fe.