Abstract
We report on the first absolute transition frequency measurement at the level with a single, laser-cooled ion in a linear Paul trap. For this measurement, a frequency comb is referenced to the transportable Cs atomic fountain clock of LNE-SYRTE and is used to measure the electric-quadrupole transition frequency. After the correction of systematic shifts, the clock transition frequency is obtained, which corresponds to a fractional uncertainty within a factor of 3 of the Cs standard. In addition, we determine the Landé factor of the level to be .
- Received 6 June 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.023002
©2009 American Physical Society