Intensities of the K-LL Auger lines

Abstract

The variation with Z of the intensities of the different lines in the K-LL Auger spectrum is calculated non-relativistically on intermediate coupling theory, using the transition amplitudes computed by Callan for all elements from Z = 12 to Z = 41 and for ten additional atomic numbers in the range from Z = 44 to Z = 80. The calculations have been made assuming the coupling to be between the two final vacancies in the atom as well as between the initial vacancy in the atom and the hole in the continuum representing the ‘missing’ Auger electron. Good agreement with existing experimental values is obtained, except for elements with large atomic number, for which relativistic effects cannot be ignored. Deviations from pure L-S coupling are found to begin practically from Z = 25, while extreme j-j coupling is not fully approached even at Z = 80. Comparison with previous theoretical work is discussed. Also the differences introduced by treating the system as one of two electrons, rather than in the correct way as one of two holes, are demonstrated.