The KLL Auger spectrum of atomic aluminum has been recorded applying electron impact for the creation of 1s core hole states. The experimental results are compared to predictions obtained with ab initio calculations for spectral structures.
High-resolution 4f photoelectron and subsequent Auger-electron spectra have been measured from free Pb atoms using synchrotron radiation. The fine structure of the spectra has been investigated theoretically by calculating the energies and intensities for 4f photoionization and Auger decay processes using the multiconfigurational Dirac-Fock approach. The role of the relativistic effects in the ground and singly and doubly ionized states has been studied on the basis of computed results and their comparison with experiment.
The KLL Auger electron spectrum of free silicon atoms has been recorded using electron impact ionization. Besides normal KLL Auger lines, the spectrum shows a rich satellite structure. The KLL Auger transitions following a shake-off or a shake-up of the outermost electron during the K ionization are found to create the strongest satellite spectra. The satellite intensities relative to the total normal KLL Auger intensity were determined semiempirically. The spectral structures have been identified using Hartree-Fock calculations obtained with Cowan's code.
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