Relativistic calculations of the ground and inner-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>L</mml:mi></mml:math>-shell excited energy levels of berylliumlike ions

Abstract

Large-scale relativistic configuration-interaction method combined with many-body perturbation theory is consistently applied to calculations of the energy levels of the ground and inner-$L$-shell excited states of berylliumlike ions in the range $10\ensuremath{\le}Z\ensuremath{\le}92$. The quantum electrodynamics, nuclear recoil, and frequency-dependent Breit corrections are taken into account. The obtained results are supplemented with the systematical estimation of the uncertainties.