QED calculation of the ground-state energy of berylliumlike ions

Abstract

Ab initio QED calculations of the ground-state binding energies of berylliumlike ions are performed for the wide range of the nuclear charge number: Z=18-96. The calculations are carried out in the framework of the extended Furry picture starting with three different types of the screening potential. The rigorous QED calculations up to the second order of the perturbation theory are combined with the third- and higher-order electron-correlation contributions obtained within the Breit approximation by the use of the large-scale configuration-interaction Dirac-Fock-Sturm method. The effects of nuclear recoil and nuclear polarization are taken into account. The ionization potentials are obtained by subtracting the binding energies of the corresponding lithiumlike ions. In comparison with the previous calculations the accuracy of the binding energies and the ionization potentials is significantly improved.

2 figures, 5 tables

References in corpus (12)

• Nuclear deformation effect on the binding energies in heavy ions
• Relativistic recoil, electron-correlation, and QED effects on the 2p_j-2s transition energies in Li-like ions
• Non-perturbative calculation of the two-loop Lamb shift in Li-like ions
• QED calculation of the 2p3/2-2p1/2 transition energy in five-electron ion of argon
• QED treatment of electron correlation in Li-like ions
• Nuclear polarization study: New frontiers for tests of QED in heavy highly charged ions
• Ground-state hyperfine structure of H-, Li-, and B-like ions in middle-Z region
• Two-loop QED corrections with closed fermion loops
• Screened QED corrections to the g factor of Li-like ions
• Relativistic configuration-interaction calculation of $K\alpha$ transition energies in beryllium-like iron
• QED calculation of the 2p1/2-2s and 2p3/2-2s transition energies and the ground-state hyperfine splitting in lithiumlike scandium
• The nonrelativistic limit of Dirac-Fock codes: the role of Brillouin configurations

Cited by in corpus (15)

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• Relativistic calculations of the ground and inner-L-shell excited energy levels of berylliumlike ions
• Ab initio calculations of energy levels in Be-like xenon: strong interference between electron-correlation and QED effects
• Variational Dirac-Coulomb explicitly correlated computations for atoms and molecules
• Ab initio calculations of the $2p_{3/2}\to 2s$ transition in He-, Li-, and Be-like uranium
• Vacuum polarization and Wichmann-Kroll correction in the finite basis set approximation
• Redefined vacuum approach and gauge-invariant subsets in two-photon-exchange diagrams for a closed-shell system with a valence electron
• Testing strong-field QED to second-order in the highly correlated atomic system berylliumlike Pb78+ by electron-ion recombination spectroscopy
• Many-electron effects in the hyperfine splitting of lithiumlike ions
• Complex-scaled ab initio QED approach to autoionizing states
• Precise determination of the 2s22p5-2s2p6 transition energy in fluorine-like nickel utilizing a low-lying dielectronic resonance
• QED approach to valence-hole excitation in closed shell systems
• Insight into the prospective evaluation of third-order interelectronic corrections on Li-like ions