Abstract

We have remeasured the absolute 1S-2S transition frequency νH in atomic hydrogen. A comparison with the result of the previous measurement performed in 1999 sets a limit of (-29 ± 57) Hz for the drift of νH with respect to the ground state hyperfine splitting νCs in 133Cs. Combining this result with the recently published optical transition frequency in 199Hg+ against νCs and a microwave 87Rb and 133Cs clock comparison, we deduce separate limits on α˙ / α = (-0.9 &plusm; 2.9) x 10-15 yr-1 and the fractional time variation of the ratio of Rb and Cs nuclear magnetic moments μRb / μCs equal to (-0.5 &plusm; 1.7) x 10-15 yr-1. The latter provides information on the temporal behavior of the constant of strong interaction.

Department(s)

Physics

Keywords and Phrases

Atomic Physics; Cesium; Cooling; Frequencies; Ground State; Hydrogen; Light Absorption; Magnetic Moments; Photodiodes; Rubidium; Ultrahigh Vacuum; Ultraviolet Radiation

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2004 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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