Interchannel Interactions and Relaxation in the 2p Auger Spectra of Mg-like lons

Abstract

Relativistic Auger rates for the 2p spectra of Mg-like ions have been calculated in the atomic range 13 ⩽ Z ⩽ 36. We used the multiconfiguration Dirac-Fock method but beyond a simple frozen-orbital approach we include also relaxation for the bound electrons and the interchannel interaction between the continuum states. Both effects may alter the individual transition rates remarkably. This is analysed for a few selected states within the isoelectronic sequence. Weak transitions within the 2p spectra can be changed by an order of magnitude because of the continuum coupling. The influence of both effects for higher-Z ions is reduced but still remain visible.