Phys. Rev. Lett. 85, 1622–1625 (2000)Measurement and Cancellation of the Cold Collision Frequency Shift in an 87Rb Fountain Clock
We measure a cold collision frequency shift in an 87Rb fountain clock that is fractionally 30 times smaller than that for Cs. The shift is -0.38(8)mHz for a density of 1.0(6)×109cm-3. We study the cavity pulling of the atomic transition and use it to cancel the cold collision shift. We also measure the partial frequency shifts of each clock state finding 2(λ10-λ20)/(λ10+λ20) = 0.1(6). © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.1622
DOI:
10.1103/PhysRevLett.85.1622
PACS:
32.80.Pj, 06.30.Ft, 34.20.Cf
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