Energy Levels, Lifetimes, and Radiative Data of Xe XXIV

The multi-configuration Dirac–Hartree–Fock method is employed to calculate the energy levels, wavelengths, transition probabilities, and line strengths for electric dipole allowed (E1) and forbidden (M1, E2, M2) lines for the 4s 2 4p and 4s4p 2 configurations of Xe XXIV. From our radiative decay probabilities, we have also derived the radiative lifetimes of 10 fine-structure energy levels. The valence–valence (VV) and core–valence (CV) correlation effects, Breit interactions, as well as quantum electrodynamics (QED) effects are estimated in the subsequent relativistic configuration interaction (CI) calculations. The present results are compared with the experimental data and with the values from other calculations. In this paper, we predict new data for several radiative data where no other theoretical and/or experimental results are available.