Electron correlation effect on radiative decay processes of the core-excited states of Be-like ions

Abstract

Energy levels and the radiative decay processes of the core-excited configurations 1s2s22p and 1s2p3 of Be-like ions with Z=8–54 are studied. Electron correlation effect on the energy levels and the radiative transition rates are studied in detail. Except for E1 radiative transition rates, the E2, M1 and M2 forbidden transitions are also explored. Further relativistic corrections from the Breit interaction, quantum electrodynamics and the finite nuclear size are included in the calculations to make the results more precise. Good agreement is found between our results and other theoretical data.