Relativistic many-body calculations of [2p53s] excited-state energy levels for neonlike ions

Relativistic many-body perturbation theory is applied to determine energies of [2${\mathit{p}}^5$3s] excited states of neonlike ions with nuclear charges in the range Z=10–92. These calculations start with a ${\mathit{V}}^{\left(\mathit{N}\mathrm{-}1\right)}$ Hartree-Fock potential and include correlation corrections. Core-hole corrections are treated to all orders in perturbation theory while the core-core, valence-core, and valence-hole corrections are treated to second order only. The Breit interaction is also included to second order, but the dominant correlation corrections to the Breit interaction are identified and iterated to all orders. Frequency-dependent corrections to the Breit interaction and mass-polarization corrections are treated to first order only. Lowest-order radiative corrections are included by evaluatng the electron self-energy and vacuum polarization in a local potential that approximates the Hartree-Fock potential. Detailed comparisons are made with measurements and with other calculations.