Relativistic Many-Body Perturbation Theory Approach to Computing Spectra of Complex Atomic Systems: Spectral Data for Ne-like Ions

We present the results of calculations of the transition probabilities and energies of levels of the configurations 2s22p53s, 3p, 3d, 4s, 4p, 4d and others in the spectra of some Ne-like multicharged ionsNe-like multicharged ions. As a calculation method we have used the gauge-invariant relativistic many-body perturbation theoryRelativistic many-body perturbation theory (PT) with the optimized Dirac–Kohn–Sham zeroth approximation. The effective approach to construction of the optimal PT zeroth approximation is based on an accurate treatment of the PT lowest order multielectron exchange–correlation effects, in particular, the gauge dependent radiative contributions into the radiation width of atomic level for the certain class of the photon propagators. This value is considered to be the typical representative of the important multielectron exchange–correlation effects, whose minimization is a reasonable criterion in the searching for the optimal PT one-electron functions basis. All principal exchange–correlation corrections of the PT second order and dominated classes of the higher orders diagrams (polarization interaction, quasiparticles screening, etc.) have been taken into account. The obtained spectral data are compared with available experimental and alternative theoretical results.