Extended calculations of energy levels, radiative properties, AJ, BJ hyperfine interaction constants, and Landé gJ-factors for Nitrogen-like Se XXVIII. (November 2018) - Wang, K.
Highlights: Energies, transition rates, hyperfine interaction constants, and Landé gJ -factors of the lowest 316 levels in Se XXVIII are provided. The MCDF and MBPT methods are employed. The most accurate and complete atomic data on Se XXVIII are provided. Abstract: Employing two state-of-the-art methods, multiconfiguration Dirac–Fock and second-order many-body perturbation theory, highly accurate calculations are performed for the lowest 316 fine-structure levels arising from the 2 s 2 2 p 3, 2 s 2 p 4, 2 p 5, 2 s 2 2 p 2 3 l, 2 s 2 p 3 3 l, 2 p 4 3 l, and 2 s 2 2 p 2 4 l configurations in nitrogen-like Se XXVIII. Complete and consistent atomic data, including excitation energies, lifetimes, wavelengths, hyperfine structures, Landé gJ -factors, and E1, E2, M1, M2 line strengths, oscillator strengths, and transition rates among these 316 levels are provided. Comparisons are made between the present two data sets, as well as with other available experimental and theoretical values. Previous measured lines of Se XXVIII are affected by large errors for some transitions, and should be remeasured. The present calculations provide a consistent and accurate data set for line identification and modeling purposes, which can also be considered as a benchmark for other calculations. The present data are accurate enough for identification and deblending of emission lines involving the n = 3, 4 levels, and are also useful for modeling and diagnosing fusion plasmas.