The KLL and KLM Auger spectra of 3d transition metals, Z=23-26

High resolution (1.0-1.6 eV) X-ray excited KLL and KLM Auger spectra and the respective Auger parameters of V, Cr, Mn and Fe, obtained from thin metallic layers, are reported. The corresponding experimental (Auger) transition energies (the first high resolution experimental data except for Mn) and relative Auger intensities are compared with data obtained earlier following electron capture in the decay of radioactive isotopes, and also with available theoretical estimates. Differences in the surface chemical states of the samples and in the methods applied for evaluation of the spectra could explain the considerable deviations between the two sets of experimental results, rather than differences in the Auger process following photoionization and electron capture. The number of Anger transitions identified in the KLL spectra shows the applicability of the intermediate coupling model for these cases.