Showing papers by "Royal Institute and Observatory of the Spanish Navy published in 2017"
01 Jul 2017
TL;DR: In this paper, the absolute frequency measurement of the transition 1S 0 -3P 0 at 578 nm in ytterbium 171 realized in an optical lattice frequency standard relative to the cryogenic caesium fountain ITCsF2.
Abstract: We present the absolute frequency measurement of the transition 1S 0 – 3P 0 at 578 nm in ytterbium 171 realized in an optical lattice frequency standard relative to the cryogenic caesium fountain ITCsF2. The measurement result is 518 295 836 590 863.59(31) Hz with a relative standard uncertainty of 5.9 × 10−16. A contribution of 1.6 × 10−16 is coming from the ytterbium clock and we are working to reduce this contribution to the 1 × 10−17 level.
2 citations