L1-L23M Coster-Kronig transition energies

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Abstract
A non-relativistic atomic Hartree-Fock self-consistent field method has been used to demonstrate that L1-L23M Coster-Kronig transition energies are highly dependent upon the state of multiple ionization of the atom. The limiting atomic number values for energetically allowed processes corresponding to selected initial defect configurations have been determined. The calculated Coster-Kronig energy values are in acceptable agreement with the limited experimental results available. They are however significantly smaller than the empirical values commonly used in transition rate studies. The importance of the present findings for the interpretation of X-ray and Auger satellite spectra and for the interpretation of experimental data on the variation of fluorescence yield with atomic configuration is discussed. It is concluded that similar behaviour for Coster-Kronig processes associated with other shells in heavy atoms should be possible.