Abstract
Relativistic excitation energies and transition rates from the S01 ground states to the first P13 and P11 excited states of berylliumlike ions are determined by using the newly developed multiconfiguration relativistic random-phase approximation (MCRRPA). Results from the MCRRPA theory are compared with those from other theories and experiments. The large discrepancies between the single-configuration RRPA predictions of excitation energies and the precise experimental values are resolved.