Abstract
The X-ray photoelectron spectrum of Kr in the neighbourhood of the main 3p lines has been calculated using diagrammatic many-body theory for the 3p self-energy and spectral function. Super Coster-Kronig 3p to or from 3d2 epsilon f dipole fluctuations are found to shift the 3p lines by about 3 eV from their Delta SCF positions, the dipole shift being approximately 30% of the Delta SCF monopole relaxation shift. For determining the 3p linewidth the 3p to 3d4s epsilon p and 3p to 3d4p epsilon d Coster-Kronig transitions and the super Coster-Kronig transitions are approximately equally important. The calculated positions and widths of the 3p main lines are in good agreement with experiment.