Autoionization accompanying emission of internal bremsstrahlung in $K$ capture

We have calculated the probability of a process in which internal bremsstrahlung associated with $K$ electron capture in an allowed transition is accompanied by the simultaneous ejection of the uncaptured $K$ electron. Consideration has been given to the case where the ejected electron is produced by the sudden change in the nuclear Coulomb field in the capture process, and to ejection produced by interactions between the two $K$ electrons. The relative importance of the respective contributions is discussed.

RADIOACTIVITY Calculated simultaneous IB and autoionization in EC; ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ar}$, ${}_{}{}^{55}{}_{}{}^{}\mathrm{Fe}$.