Результаты исследований: Научные публикации в периодических изданиях › статья
QED calculation of the ground-state energy of berylliumlike ions. / Malyshev, A.V.; Volotka, A.V.; Glazov, D.A.; Tupitsyn, I.I.; Shabaev, V.M.; Plunien, G.
в: Physical Review A - Atomic, Molecular, and Optical Physics, Том 90, № 6, 2014, стр. 062517_1-8.Результаты исследований: Научные публикации в периодических изданиях › статья
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TY - JOUR
T1 - QED calculation of the ground-state energy of berylliumlike ions
AU - Malyshev, A.V.
AU - Volotka, A.V.
AU - Glazov, D.A.
AU - Tupitsyn, I.I.
AU - Shabaev, V.M.
AU - Plunien, G.
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
U2 - 10.1103/PhysRevA.90.062517
DO - 10.1103/PhysRevA.90.062517
M3 - Article
VL - 90
SP - 062517_1-8
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 6
ER -
ID: 7035919