Relativistic configuration-interaction calculations on K α X-ray satellites of medium-charge Be-like ions

This study puts forward a calculation of the transitions of 1s2s(2)2p P-1(1)-1s(2)2s(2 1)S(0) and 1s2s(2)2p P-3(1)-1s(2)2s(2 1)S(0) for Be-like ions (Z = 6-30) using the multiconfiguration Dirac-Hartree-Fock (MCDHF) and relativistic configuration interaction methods. The computational results include transition wavelengths, transition probabilities, line strengths, and weighted oscillator strengths. The calculations also consider the contributions of the Breit interaction and quantum electrodynamics corrections (QED) to these levels. The results show that the contribution of the Breit interaction, self-energy, and vacuum polarization increase rapidly with increasing nuclear charge for certain configurations. The present calculated values are in good agreement with previous theoretical and experimental results, with errors better than 0.3%. A(V)/A(L) comparisons demonstrate the reliability of the data.