M₂,₃-shell Auger and autoionisation spectra of free Cr, Mn, Fe, Co, Ni and Cu atoms

The M2,3M4,5M4,5 Auger and autoionisation spectra of atomic Cr, Mn, Fe, Co, Ni and Cu have been measured using 1.5 keV electron beam excitation. The spectra are dominated by Coster-Kronig and super Coster-Kronig transitions following 3p63dn4sm to 3p53dn+14sm excitation and 3p63dn4sm to 3p53dn+4sm epsilon l ionisation. The strong coupling of the 3p63dn4sm to 3p63dn-14sm epsilon l ionisation and the 3p63dn4sm to 3p53dn+14sm excitation gives rise to asymmetric Fano-type profiles of the 3p53dn+14sm to 3p63dn-14sm epsilon l lines.