Energies, Oscillator Strengths, and Lifetimes for Neon-like Ions Up to Kr XXVII

Energy Levels and Radiative Rates for Transitions in F-like Sc XIII and Ne-like Sc XII and Y XXX

“…Such weak transitions (and discrepancies between different calculations) do not affect the modelling, or the subsequent calculations of lifetimes, τ = 1.0/Σ i A ji , which includes contributions from all types of transitions, i.e., E1, E2, M1, and M2. This is further confirmed by comparing our results for τ, included in Tables 6-8, for the lowest 27 levels of Sc XII in Table 11, with those of Hibbert et al [9] and Jönsson et al [10], for which the agreements are within 10% for most levels. Table 7.…”

“…Ne-like ions are of interest for the studies of astrophysical, lasing and fusion plasmas, and therefore many workers, such as [5][6][7][8][9][10], have reported data for a wide range of ions. However, for brevity, many of them have not reported data for Sc XII, although Hibbert et al [9] have listed lifetimes (τ) for the lowest 27 levels of the 2s 2 2p 6 and 2s 2 2p 5 3 configurations.…”

“…However, for brevity, many of them have not reported data for Sc XII, although Hibbert et al [9] have listed lifetimes (τ) for the lowest 27 levels of the 2s 2 2p 6 and 2s 2 2p 5 3 configurations. The only other results available for comparisons are those of Cogordan and Lunell [5] and Jönsson et al [10], but are limited to the lowest 27 levels of the 2s 2 2p 6 and 2s 2 2p 5 3 configurations.…”

Excited states of Ne isoelectronic ions: SAC-CI study

“…It essentially means that our predicted energy levels are very stable. The SAC-CI excitation energies of the 2p 5 3s: 1 P 1 states for Mg 2+ to P 5+ agree well with the experimental values and also with the values of the CI method [9]. For the 2p 5 4s: 1 P 1 states, SAC-CI gives good results for these highly ionized atoms: the errors are in the order of mhartree whereas the values of Hibbert and Scott [5] for Ne to Si 4+ are much higher.…”

“…Among different theoretical approaches, the relativistic many body theory of Avgoustoglou et al [1], configuration interaction (CI) approach of Hibbert, La Dourneuf and Mohan [9], coupled cluster with singles, doubles and triples (CCSD+T) by Kaldor and Haque [10], the Rmatrix with CI wave functions calculation of Hibbert and Scott [5], the relativistic random phase approximation with exchange (RPAE) by Shorer [11] and the timedependent coupled Hartree-Fock (TDCHF) approach of Das [12] are important. In the previous paper [12], transition energies of optically allowed and optically forbidden excited energy levels up to principal quantum number n = 4 have been studied for the first eight members of Ne isoelectronic sequence from Ne to Cl 7+ using linearized version of TDCHF theory.…”