Absolute frequency measurement of the 2S-8S/D transitions in hydrogen and deuterium: New determination of the rydberg constant

B. De Beauvoir, F. Nez, L. Julien, B. Cagnac, F. Biraben, D. Touahri, L. Hilico, O. Acef, A. Clairon, J. J. Zondy

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Abstract

We have performed a pure optical frequency measurement of the 2S-8S/D two-photon transitions in atomic hydrogen and deuterium. These frequencies are directly compared to a new frequency standard, a diode laser stabilized to a two-photon transition at 778 nm in rubidium. We deduce a new value for the Rydberg constant, R = 109 737.315 685 9(10) cm−1 with an uncertainty of 9×10−12. From the isotope shift, we derive a precise value of the 2S Lamb shift in deuterium [L2S-2P = 1059.230(9) MHz] and the difference of the quadratic charge radii of deuteron and proton.

Original languageEnglish
Pages (from-to)440-443
Number of pages4
JournalPhysical Review Letters
Volume78
Issue number3
DOIs
Publication statusPublished - Jan 20 1997

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

De Beauvoir, B., Nez, F., Julien, L., Cagnac, B., Biraben, F., Touahri, D., Hilico, L., Acef, O., Clairon, A., & Zondy, J. J. (1997). Absolute frequency measurement of the 2S-8S/D transitions in hydrogen and deuterium: New determination of the rydberg constant. Physical Review Letters, 78(3), 440-443. https://doi.org/10.1103/PhysRevLett.78.440