QED calculation of the n=1 and n=2 energy levels in He-like ions (26 pages)

By A. Artemyev, V. Shabaev, V. Yerokhin, G. Plunien, G. Soff. 2005

167 citations recorded by the source corpus.

We perform ab initio QED calculations of energy levels for the $n=1$ and $n=2$ states of He-like ions with the nuclear charge in the range $Z=12\text{\char21{}}100$. The complete set of two-electron QED corrections is evaluated to all orders in the parameter $\ensuremath{\alpha}Z$. Uncalculated contributions to energy levels come through orders ${\ensuremath{\alpha}}^{3}{(\ensuremath{\alpha}Z)}^{2}$, ${\ensuremath{\alpha}}^{2}{(\ensuremath{\alpha}Z)}^{7}$, and higher. A significant improvement in accuracy of theoretical predictions is achieved, especially in the high-$Z$ region.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/a7f60b2a7e128acae97772b7f113e577526de6b3

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

CHIANTI - An atomic database for Emission Lines. Version 8 (2015, background): “Highly accurate calculations of the energies of the six 1s2s and 1s2p fine structure levels provided by Artemyev et al. (2005) have been included.”
Highly charged ions: Optical clocks and applications in fundamental physics (2018, methodology): “perturbation theory for systems with up to three, or four electrons (Artemyev et al., 2005; Sapirstein and Cheng, 2011; Yerokhin et al., 2007, 2003; Yerokhin and Shabaev, 2015).”
Search for New Physics with Atoms and Molecules (2017, methodology): “The energy of the 1s2s 3S1 − 1s2 1S0 magnetic dipole transition in helium-like Argon was measured to 2.5 ppm accuracy by Amaro et al. (2012), differing by 1.6 σ from the theoretical prediction of Artemyev et al. (2005).”