Relativistic atomic structure calculations and evaluation of plasma parameters in Be-like ions for its possible use in laboratory plasma diagnostic studies

We have performed atomic structure calculations of Be-like C, N, O and Ne ions using systematically enlarged multiconfiguration Dirac–Fock wavefunctions. Present calculations are fully relativistic in nature with Breit interaction and quantum electrodynamic (QED) corrections such as vacuum polarization and self-energy correction to obtain low lying energy levels, transition probability, oscillator strength and line strength. Selective radiative data for electric dipole, magnetic quadrupole and fine structure data in terms of hyperfine coupling constants and isotopic shift parameters are also reported. Comparisons are made with the existing available results and a good agreement has been found. Additionally, an attempt is made to study the impact of relativistic and QED corrections on forbidden and allowed transitions. We have also used the above-computed transition probabilities here to provide the line intensity ratio and plasma parameters of optically thin and moderately dense plasma. We believe that the detailed atomic data computed here will be further helpful in line identification and plasma modeling studies for laboratory plasma devices like ITER and astrophysical plasma work related to elemental abundance calculations from solar corona to active galactic nuclei