%0 Journal Article
%T 2s Hyperfine Structure in Hydrogen Atom and Helium-3 Ion
%A Savely G. Karshenboim
%J Physics
%D 2001
%I arXiv
%X The usefulness of study of hyperfine splitting in the hydrogen atom is limited on a level of 10 ppm by our knowledge of the proton structure. One way to go beyond 10 ppm is to study a specific difference of the hyperfine structure intervals 8 Delta nu_2 - Delta nu_1. Nuclear effects for are not important this difference and it is of use to study higher-order QED corrections.
%U http://arxiv.org/abs/physics/0102085v1