Ground state hyperfine splitting in ^6,7Li atoms and the nuclear structure

Abstract

Relativistic and QED corrections were calculated for hyperfine splitting of the $2S_{1/2}$ ground state in ${}^{6,7}$Li atoms with an exact account for electronic correlations. The resulting theoretical predictions achieved such a precision level that, by comparison with experimental values, they enable determination of the nuclear properties. In particular, the obtained results show that the ${}^7$Li nucleus, having a charge radius smaller than ${}^6$Li, has about a 40% larger Zemach radius. Together with known differences in the electric quadrupole and magnetic dipole moments, this calls for a deeper understanding of the Li nuclear structure.

5 pages, corrected numerics

References in corpus (2)

• CODATA Recommended Values of the Fundamental Physical Constants: 2010
• Hyperfine structure of Li and Be^+

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• Ground state hyperfine splitting in the Be${}^{+}$ ion
• Precision spectroscopy on ${}^9$Be overcomes limitations from nuclear structure
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• Higher-order QED corrections to the hyperfine splitting in ${}^3$He
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• Accurate determination of ${}^{6,7}$Li nuclear magnetic moments
• Thermal radiative corrections to hyperfine structure of light hydrogen-like systems
• Splitting Isotope Shift in the $1s2p{}^3{P}_{0,1,2}$ Fine-Structure Triplet in ${}^{12,13,14}$C${}^{4+}$: Experiment and Theory
• Deformed Explicitly Correlated Gaussians
• Theoretical calculation of nuclear reactions of interest for Big Bang Nucleosynthesis