Correlation, Breit, and QED effects in spectra of Mg-like ions

Abstract

We calculated spectra of the first six members of the Mg-like isoelectronic sequence using different approximations. The most accurate results were obtained with the configuration interaction + all order method (CI+AO), which provided relative accuracy for transition energies on the level of 0.1\%, or better. On this level of accuracy the Breit and QED corrections become important for the systems with nuclear charge $Z\gtrsim 20$. The retardation part of the Breit interaction and QED corrections for the partial waves with $l\ne 0$ are still too small to be important.

8 pages, 2 figures

References in corpus (4)

• Development of a configuration-interaction + all-order method for atomic calculations
• Relativistic Equation of Motion Coupled-Cluster Method: Application to the closed-shell atomic systems
• Double core polarization contribution to atomic PNC and EDM calculations
• Coupled-cluster single-double calculations of the relativistic energy shifts in C IV, Na I, Mg II, Al III, Si IV, Ca II and Zn II

Cited by in corpus (4)

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• Theoretical study on the hyperfine interaction constants and the isotope shift factors for the $3s^2{}^1{S}_0-3s3p{}^{3,1}{P}_1^o$ transitions in Al${}^{+}$
• Precision calculation of energy levels for four-valent Si I