Abstract.
We present a new evaluation of an 87Sr optical lattice clock using spin polarized atoms. The frequency of the 1S0→3P0 clock transition is found to be 429 228 004 229 873.6 Hz with a fractional uncertainty of 2.6×10-15, a value that is comparable to the frequency difference between the various primary standards throughout the world. This measurement is in excellent agreement with a previous one of similar accuracy [Phys. Rev. Lett. 98, 083002 (2007)].
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Baillard, X., Fouché, M., Le Targat, R. et al. An optical lattice clock with spin-polarized 87Sr atoms. Eur. Phys. J. D 48, 11–17 (2008). https://doi.org/10.1140/epjd/e2007-00330-3
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DOI: https://doi.org/10.1140/epjd/e2007-00330-3