Ab initio many electron relativistic molecular DFS-calculations of inner shell MO-transitions

Using a relativistic molecular DFS code we have calculated a self-consistent many electron relativistic correlation diagram of the system Cl-Ar. The resulting energy for the 2pπ-1sσ transition is in complete agreement with the experimental results of Schuch et al./1/. This definitely confirms their claim that they are able to measure this quantity from interference structures observed in quasi-molecular K-X-ray spectra.