Relativistic recoil, electron-correlation, and QED effects on the 2p_j-2s transition energies in Li-like ions

TL;DR

This paper presents comprehensive relativistic, electron-correlation, and QED calculations for the 2p_j-2s transition energies in Li-like ions, improving theoretical accuracy and comparison with experimental data across Z=10-60.

Contribution

It introduces all-order relativistic recoil, interelectronic-interaction, and QED corrections using advanced computational methods for Li-like ions.

Findings

Calculated transition energies agree with experimental data.

Provided improved theoretical models for high-Z ions.

Quantified effects of recoil, correlation, and QED on transition energies.

Abstract

The relativistic nuclear recoil, higher-order interelectronic-interaction, and screened QED corrections to the transition energies in Li-like ions are evaluated. The calculation of the relativistic recoil effect is performed to all orders in 1/Z. The interelectronic-interaction correction to the transition energies beyond the two-photon exchange level is evaluated to all orders in 1/Z within the Breit approximation. The evaluation is carried out employing the large-scale configuration-interaction Dirac-Fock-Sturm method. The rigorous calculation of the complete gauge invariant sets of the screened self-energy and vacuum-polarization diagrams is performed utilizing a local screening potential as the zeroth-order approximation. The theoretical predictions for the 2p_j-2s transition energies are compiled and compared with available experimental data in the range of the nuclear charge number Z=10-60.