Interelectronic-interaction effect on the transition probability in high-$Z$ He-like ions

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.

Figure 1

The photon emission by a heliumlike ion in zeroth-order approximation.

Figure 2

The $1∕Z$ interelectronic-interaction corrections to the photon emission by a heliumlike ion.

Figure 3

One-photon exchange diagram.