Decay of the $1s^{2}2s3p$ ${}^3{P}_0$ level in Be-like ions

The lifetime of the $1s{}^{2}2s3p$ ${}^3{P}_0$ level of selected Be-like ions, from $Z=5$ to $Z=92$, is calculated using the multiconfiguration Dirac-Fock method including QED corrections. Full correlation up to the $4f$ subshell in both initial and final levels for all possible decay modes was included. The results are in reasonable agreement with the scarce existing experimental and theoretical data.

Figure 1

Energy levels for $Z=26$ and decay channels from the Be-like $1s{}^{2}2s3p$ ${}^3{P}_0$ level.

Figure 2

Transition-probability values for two-electron one-photon decay channel of the $1s{}^{2}2s3p$ ${}^3{P}_0$ level to the $1s{}^{2}2p^2$ ${}^3{P}_1$ level in Be-like ions as a function of $Z$, calculated with and without correlation.

Figure 3

Transition probability for all possible decay channels of the $1s{}^{2}2s3p$ ${}^3{P}_0$ level in Be-like ions as a function of $Z$.