Electron-correlation effects in the $g$-factor of light Li-like ions

Abstract

We investigate electron-correlation effects in the $g$-factor of the ground state of Li-like ions. Our calculations are performed within the nonrelativistic quantum electrodynamics (NRQED) expansion up to two leading orders in the fine-structure constant $\alpha$, ${\alpha }^2$ and ${\alpha }^3$. The dependence of the NRQED results on the nuclear charge number $Z$ is studied and the individual $1/Z$-expansion contributions are identified. Combining the obtained data with the results of the all-order (in $Z\alpha$) calculations performed within the $1/Z$ expansion, we derive the unified theoretical predictions for the $g$-factor of light Li-like ions.

arXiv comment9 pages, 4 tables

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• QED effects in quadratic Zeeman splitting in highly charged hydrogen-like ions
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