Intensity Distributions of the K Emission Spectra of Iron

Abstract

A curved crystal spectrometry is applied for the study of the electron excited (30 kV) FeK emission spectra. No fine structure is directly seen in the α1,2 and β1,3 lines, but the lines are strongly asymmetric. The asymmetry is due to relatively strong low energy satellites, probably caused by the radiative Auger effects K → LV, K Deutsche Forschungsgemeinschaft MV, in addition to interactions between the final state hole and the unfilled 3d level for β1,3; and to unresolved splittings of the LIII and LII levels for α1 and α2. Weak high energy satellites are also present for the same lines and most likely due to a spectator vacancy in the M level and/or in the valence band V. The Kβ5 band is corrected for background, continuous radiation, self‐absorption, and overlap with β1,3. The intensity maximum of Kβ5 is (2.56 ± 0.1) eV below the Fermi energy. The FWHM value for α1 is (2.60 ± 0.05), for α2 (3.02 ± 0.05), for β1,3 (4.04 ± 0.05), and for β2,5 (5.56 ± 0.05) eV. The index of asymmetry for α1 is (1.57 ± 0.05), for α2 (1.26 ± 0.05), and for β1,3 (1.77 ± 0.05). The spin—Orbit splitting between the 3p3/2 and the 3p1/2 levels obtained from the Lorentzian fit for β1,3 is (1.22 ± 0.05) eV, whereas Hartree‐Fock calculations give 1.58 eV.