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

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Cited by in corpus (19)

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• Probing new bosons and nuclear structure with ytterbium isotope shifts
• Ground-state ionization energies of boronlike ions
• Ionization energies along beryllium isoelectronic sequence
• Relativistic calculations of the ground and inner-L-shell excited energy levels of berylliumlike ions
• Isotope shifts of the 2$p_{3/2}$-2$p_{1/2}$ transition in B-like ions
• Ab initio calculations of energy levels in Be-like xenon: strong interference between electron-correlation and QED effects
• QED calculation of electron-electron correlation effects in heliumlike ions
• Variational Dirac-Coulomb explicitly correlated computations for atoms and molecules
• QED radiative corrections to the ${}^2$P${}_{1/2}$-${}^2$P${}_{3/2}$ fine-structure in fluorinelike ions
• 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
• Many-electron effects in the hyperfine splitting of lithiumlike ions
• Testing strong-field QED to second-order in the highly correlated atomic system berylliumlike Pb78+ by electron-ion recombination spectroscopy
• 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