Revised and extended calculations with relativistic and QED corrections of selected He-like 3d-elemental ions having astrophysical significance

Abstract

We have systematically enlarged Multiconfiguration Dirac-Fock wavefunctions for the relativistic configuration interaction calculation to include the Breit interaction and quantum electrodynamic corrections for evaluating fine structure data of He-like ions having non-zero nuclear spin for five 3d group elements Scandium, Vanadium, Manganese, Cobalt and Copper. Computed energy levels, transition probabilities, oscillator strengths and x-ray wavelengths are compared with the available experimental values and theoretical computations. Special emphasis is given on the forbidden transition rates and hyperfine structure calculations as they are of potential interest in astrophysics. An attempt is made to study the individual contributions of the relativistic effects through Breit interaction and the quantum electrodynamic corrections such as vacuum polarization and self-energy correction to the line strengths useful for plasma diagnostic studies relevant to astrophysics. • Atomic structure calculation is done using Multiconfiguration Dirac-Fock method. • Relativistic configuration interaction calculation is used to report atomic data. • Impacts of relativistic and QED corrections on line strengths are discussed. • Hyperfine coupling constants A J & B J are evaluated for plasma diagnostic studies. • Computed atomic data for He-like odd Z 3d ions are compared with available data.