Measurement of the 2S hyperfine interval in atomic hydrogen

Measurement of the 2S hyperfine interval in atomic hydrogen

An optical measurement of the 2S hyperfine interval in atomic hydrogen using two-photon spectroscopy of the 1S-2S transition gives a value of 177 556 834.3(6.7) Hz. The uncertainty is 2.4 times smaller than achieved by our group in 2003 and more than 4 times smaller than for any independent radio-fr...

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Veröffentlicht in:Physical review letters 2009-05, Vol.102 (21), p.213002-213002
Hauptverfasser: Kolachevsky, N, Matveev, A, Alnis, J, Parthey, C G, Karshenboim, S G, Hänsch, T W
Format: Artikel
Sprache:eng
Schlagworte:
ATOMIC AND MOLECULAR PHYSICS
HYDROGEN
PHOTONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUANTUM ELECTRODYNAMICS
RADIOWAVE RADIATION
SPECTROSCOPY
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Zusammenfassung:An optical measurement of the 2S hyperfine interval in atomic hydrogen using two-photon spectroscopy of the 1S-2S transition gives a value of 177 556 834.3(6.7) Hz. The uncertainty is 2.4 times smaller than achieved by our group in 2003 and more than 4 times smaller than for any independent radio-frequency measurement. The specific combination of the 2S and 1S hyperfine intervals predicted by QED theory 8fHFS(2S)-fHFS(1S)=48 953(3) Hz is in good agreement with the value of 48 923(54) Hz obtained from this experiment.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.102.213002