Publication: Hyperfine splitting, isotope shift, and evel energy of the 3S states of 6,7Li

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Title	Hyperfine splitting, isotope shift, and evel energy of the 3S states of 6,7Li
Authors/Editors*	H. A. Bushaw, W. N\"ortersh\"auser, G. Ewald, A. Dax, G. W. F. Drake
Where published*	Phys. Rev. Lett.
How published*	Journal
Year*	2003
Volume	91
Number
Pages	043004 (4 pages)
Publisher
Keywords
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Abstract	We study the 2S-3S transition of Li-6,Li-7 by high-precision laser spectroscopy using two-photon Doppler-free excitation and photoionization detection. Interferometric cross referencing to metrologic Rb 3S-5D two-photon transitions allowed measurement of the transition isotope shift and hyperfine splitting in the 3S state with precision at the 30 kHz level. The results are IS=11 453.734(30) MHz, A(3S)(Li-6)=35.263(15) MHz, and A(3S)(Li-7)=93.106(11) MHz. Combined with recent theoretical work, the isotope shift yields a new value for the change in squared nuclear charge radii DeltaR(2)=0.47(5) fm(2). This is compared with other work and some existing discrepancies are resolved.