Precision spectroscopy on atomic hydrogen

Christian G. Parthey; Arthur Matveev; Janis Alnis; Axel Beyer; Randolf Pohl; Katharina Predehl; Thomas Udem; Nikolai Kolachevsky; Michel Abgrall; Daniele Rovera; Christophe Salomon; Philippe Laurent; Theodor W. Hänsch

doi:10.1117/12.893694

8 September 2011 Precision spectroscopy on atomic hydrogen

Christian G. Parthey, Arthur Matveev, Janis Alnis, Axel Beyer, Randolf Pohl, Katharina Predehl, Thomas Udem, Nikolai Kolachevsky, Michel Abgrall, Daniele Rovera, Christophe Salomon, Philippe Laurent, Theodor W. Hänsch

Author Affiliations +

Proceedings Volume 8132, Time and Frequency Metrology III; 813202 (2011) https://doi.org/10.1117/12.893694
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

We present a measurement of the 1S-2S transition frequency in atomic hydrogen by two-photon spectroscopy yielding f_1S-2S = 2 466 061 413 187 035 (10) Hz corresponding to a fractional frequency uncertainty of 4.2×10^-15. The result presents a more than three times improvement on the previous best measurement.

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Christian G. Parthey, Arthur Matveev, Janis Alnis, Axel Beyer, Randolf Pohl, Katharina Predehl, Thomas Udem, Nikolai Kolachevsky, Michel Abgrall, Daniele Rovera, Christophe Salomon, Philippe Laurent, and Theodor W. Hänsch "Precision spectroscopy on atomic hydrogen", Proc. SPIE 8132, Time and Frequency Metrology III, 813202 (8 September 2011); https://doi.org/10.1117/12.893694

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