Observation of the two-hole satellite in Cr and Fe metal by resonant photoemission at the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi>p</mml:mi></mml:math>absorption energy

Abstract

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 $\ensuremath{\sim}4$ 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 ${E}_{\mathrm{F}}$ in Cr and 3.2 eV below ${E}_{\mathrm{F}}$ in Fe.