Regular Article – Atomic Physics
Theoretical analysis of excitation energies and transition parameters of C-like ions
Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India
2 Department of Physics, Shyamlal College, University of Delhi, 110032, Delhi, India
Accepted: 6 October 2022
Published online: 3 November 2022
Relativistic configuration interaction results are presented for several C-like ions (Kr XXXI, Rb XXXII, Sr XXXIII) using the multi-configuration Dirac–Hartree–Fock (MCDHF) method. The calculations are performed in the active space approximation with the inclusion of the Breit interaction, the finite nuclear size effect and quantum electrodynamic corrections. Results for fine structure energy levels for 2s22p2, 2s2p3 and 2p4 configurations relative to the ground state are reported. The transition wavelengths, transition probabilities, line strengths and absorption oscillator strengths for electric dipole (E1) and magnetic quadrupole (M2) transitions are calculated among first 20 levels. The core-valence correlation effects are taken into account through single-double multireference expansions to increasing sets of active orbitals up to n = 7. Our calculated results are found to be very close to other available theoretical and experimental values. We hope that our results will be useful for experimentalists in identifying the fine structure levels in the future.
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