Interelectronic-interaction effect on the transition probability in high-ZHe-like ions

Abstract

The interelectronic-interaction effect on the transition probabilities in high-$Z$ He-like ions is investigated within a systematic quantum electrodynamic approach. The calculation formulas for the interelectronic-interaction corrections of first order in $1∕Z$ are derived using the two-time Green-function method. These formulas are employed for numerical evaluations of the magnetic transition probabilities in heliumlike ions. The results of the calculations are compared with experimental values and previous calculations.