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Phys. Rev. A 70, 062503 (2004) [6 pages]

2S hyperfine structure of atomic deuterium

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N. Kolachevsky *, P. Fendel, S. G. Karshenboim †, and T. W. Hänsch ‡
Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany

Received 7 April 2004; revised 7 July 2004; published 14 December 2004

We have measured the frequency splitting between the (2S,F=1∕2) and (2S,F=3∕2) hyperfine sublevels in atomic deuterium by an optical differential method based on two-photon Doppler-free spectroscopy on a cold atomic beam. The result fHFS(D)(2S)=40  924  454(7)  Hz is the most precise value for this interval to date. In comparison to previous radio-frequency measurements we have improved the accuracy by a factor of 3. The specific combination D21=8fHFS(D)(2S)−fHFS(D)(1S) of metastable and ground state hyperfine frequency intervals in deuterium derived from our measurement agrees well with the value for D21 calculated from quantum electrodynamics.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.70.062503
DOI: 10.1103/PhysRevA.70.062503
PACS: 32.10.Fn, 32.30.Jc, 12.20.Fv, 42.62.Fi

* Also at P. N. Lebedev Physics Institute, Moscow, Russia.
† Also at D. I. Mendeleev Institute for Metrology, St. Petersburg, Russia.
‡ Also at Ludwig-Maximilians-University, Munich, Germany.

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