Observation and absolute frequency measurements of the 1S0-3P0 optical clock transition in neutral ytterbium.

@article{Hoyt2005ObservationAA,
  title={Observation and absolute frequency measurements of the 1S0-3P0 optical clock transition in neutral ytterbium.},
  author={C. W. Hoyt and Zachry Barber and Christian Oates and Tina M. Fortier and Scott A. Diddams and Leo Hollberg},
  journal={Physical review letters},
  year={2005},
  volume={95 8},
  pages={083003}
}
We report the direct excitation of the highly forbidden (6s2) 1S0 <--> (6s6p) 3P0 optical transition in two odd isotopes of neutral ytterbium. As the excitation laser frequency is scanned, absorption is detected by monitoring the depletion from an atomic cloud at approximately 70 microK in a magneto-optical trap. The measured frequency in 171Yb (F=1/2) is 518,295,836,591.6 +/- 4.4 kHz. The measured frequency in 173Yb (F=5/2) is 518,294,576,847.6 +/- 4.4 kHz. Measurements are made with a… CONTINUE READING
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