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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163 Citations (Scopus)

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
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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