I. I. Tupitsyn, S. V. Bezborodov, A. V. Malyshev, D. V. Mironova, V. M. Shabaev, “Calculations of relativistic, correlation, nuclear and quantum-electrodynamic corrections to energy and ionization potential of the ground state of helium-like ions”, Optics and Spectroscopy, 2020, Volume 128, Issue 1,Pages <nobr>24

This article is cited in 4 papers

Spectroscopy and physics of atoms and molecules

Calculations of relativistic, correlation, nuclear and quantum-electrodynamic corrections to energy and ionization potential of the ground state of helium-like ions

I. I. Tupitsyn^abc, S. V. Bezborodov^a, A. V. Malyshev^a, D. V. Mironova^acd, V. M. Shabaev^a

^a St. Petersburg State University, Faculty of Physics
^b Center for Advanced Studies of St.-Petersburg Polytechnic University
^c B. P. Konstantinov Petersburg Nuclear Physics Institute, Russian Academy of Sciences
^d Saint Petersburg Electrotechnical University "LETI"

Abstract: In this work, nonrelativistic and relativistic variational calculations of the energies and ionization potentials of the ground state of helium-like ions for the nuclear charges in the range $Z$ = 2 – 20 were performed.the leading corrections to the total energy were calculated including the contribution of electronic correlations, relativistic and quantum-electrodynamic (QED) corrections, and the contributions of the finite size ofnucleus (field shift) and the finite mass of the nucleus (recoil effect). Relativistic сalculations of the wave functions were performed using the Dirac-Coulomb-Breit (DCB) Hamiltonian.

Keywords: He-like ions, relativistic calculations, configuration interaction, ionization potential, electron correlation, Breit interaction, field shift, recoil effect, QED corrections.

Received: 12.09.2019
Revised: 12.09.2019
Accepted: 23.09.2019

DOI: 10.21883/OS.2020.01.48834.260-19