, Volume 48, Issue 1, pp 11-17
Date: 07 Dec 2007

An optical lattice clock with spin-polarized 87 Sr atoms

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We present a new evaluation of an 87Sr optical lattice clock using spin polarized atoms. The frequency of the 1S03P0 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)].