KLL Auger decay of atomic silicon

Abstract

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.