### Abstract

Nonrelativistic and relativistic variational calculations of energies and ionization potentials of the ground state of helium-like ions with nuclear number Z = 2-20 have been performed. All leading corrections to the total energy have been calculated, including the contribution of electron correlations, relativistic and quantum-electrodynamics corrections, and contributions due to the finite nuclear size (field shift) and finite nuclear mass (nuclear recoil) effects. Relativistic wave functions were calculated using the Dirac-Coulomb-Breit Hamiltonian.

Original language | English |
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Pages (from-to) | 21-31 |

Number of pages | 11 |

Journal | OPTICS AND SPECTROSCOPY |

Volume | 128 |

Issue number | 1 |

DOIs | |

Publication status | Published - 1 Jan 2020 |

### Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics

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## Cite this

Tupitsyn, I. I., Bezborodov, S. V., Malyshev, A. V., Mironova, D. V., & Shabaev, V. M. (2020). Calculations of Relativistic, Correlation, Nuclear, and Quantum-Electrodynamics Corrections to Energy and Ionization Potential of the Ground State of Helium-Like Ions.

*OPTICS AND SPECTROSCOPY*,*128*(1), 21-31. https://doi.org/10.1134/S0030400X20010245