Abstract
Properties of the 1s2l/sup n/(2l')/sup m/ (n+m = 3) states of Be-like ions are calculated relativistically for 6< or =Z< or =26 using multiconfiguration Dirac-Fock method. Generalized Breit interaction and quantum-electrodynamic corrections are taken into account in the calculations of energies. Transition rates are computed in intermediate coupling with configuration interaction. The generalized Breit interaction is included both in the evaluation of mixing coefficients and relativistic Auger matrix elements. The contributions of the radiationless transitions to the decay of the metastable quintet states are found to be very significant. The effects of relativity and configuration interaction on the transition rates are discussed.
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