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Phys. Rev. A 79, 033403 (2009) [8 pages]

Frequency measurement of the 2S1/2-2F7/2 electric octupole transition in a single 171Yb+ ion

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K. Hosaka1,*, S. A. Webster1, A. Stannard1,2, B. R. Walton1, H. S. Margolis1, and P. Gill1,2,3
1National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom
2Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
3Blackett Laboratory, Imperial College London, South Kensington Campus, London SW7 2BZ, United Kingdom

Received 31 October 2008; published 10 March 2009

See accompanying Physics Synopsis

We report on precision laser spectroscopy of the 2S1/2(F=0)-2F7/2(F=3,mF=0) clock transition in a single ion of 171Yb+. A linewidth of <40 Hz is observed and frequency instability due to fluctuation of the ac Stark shift is reduced through improved stability of the beam alignment. The absolute value of the transition frequency, determined using an optical frequency comb, is 642 121 496 772 657±12 Hz with a fractional uncertainty of 2×10−14. This is a factor of 50 better than the previously published value [ Hosaka et al. IEEE Trans. Instrum. Meas. 54 759 (2005)].

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.79.033403
DOI:
10.1103/PhysRevA.79.033403
PACS:
37.10.Ty, 06.30.Ft, 32.30.Jc

*Present address: National Metrology Institute of Japan, Tsukuba Central 3, Umezono 1-1-1, Tsukuba 305-8563, Japan.

 
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