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.

arXiv comment8 pages, 2 figures

References in corpus (15)

• Model operator approach to the Lamb shift calculations in relativistic many-electron atoms
• Development of a configuration-interaction + all-order method for atomic calculations
• Precision determination of weak charge of ${}^{133}$Cs from atomic parity violation
• Relativistic effects in two valence electron atoms and ions and the search for variation of the fine structure constant
• On the use of the $V^{N-M}$ approximation in atomic calculations
• High-precision calculations of electric-dipole amplitudes for transitions between low-lying levels of Mg, Ca, and Sr
• Combined CI+MBPT calculations of energy levels and transition amplitudes in Be, Mg, Ca, and Sr
• Relativistic Coupled-Cluster Theory of Atomic Parity Nonconservation: Application to ${}^{137}$Ba${}^{+}$
• Relativistic general-order coupled-cluster method for high-precision calculations: Application to Al+ atomic clock
• Third-order relativistic many-body calculations of energies and lifetimes of levels along the silver isoelectronic sequence
• Improved calculation of relativistic shift and isotope shift in Mg I
• 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
• Configuration interaction calculation for the isotope shift in Mg I

Cited by in corpus (4)

• Highly charged ions: optical clocks and applications in fundamental physics
• Fock-space relativistic coupled-cluster calculation of hyperfine induced ${}^1{\mathbf{S}}_0\to {}^3{\mathbf{P}}_0^{\mathbf{o}}$ clock transition in Al${}^{+}$
• 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