Improved theoretical prediction for the 2s hyperfine interval in helium ion

Abstract

We consider the uncertainty of theoretical calculations for a specific difference of the hyperfine intervals in the 1s and 2s states in a light hydrogen-like atom. For a number of crucial radiative corrections the result for hydrogen atom and helium ion appears as an extrapolation of the numerical data from medium to low Z. An approach to a plausible estimation of the uncertainty is suggested using the example of the difference $D_{21}=8E_{hfs}(2s)-E_{hfs}(1s)$.

References in corpus (1)

• Precision Study of Positronium: Testing Bound State QED Theory

Cited by in corpus (9)

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• Study of hyperfine structure in simple atoms and precision tests of the bound state QED
• Improved constraints on exotic interactions between electron and proton in hydrogen