Phys. Rev. Lett. 92, 023001 (2004) [4 pages]Absolute Frequency Measurements of the 23S1→23P0,1,2 Atomic Helium Transitions around 1083 nmSee Also: Erratum Received 28 April 2003; published 15 January 2004 We measure the frequency of the 23S1→23P0,1,2 transitions of helium in a metastable beam using an optical frequency comb synthesizer. The relative uncertainty of these measurements ranging from 5×10-11 to 7×10-12 is, to our knowledge, the most precise result for any optical helium transition. Considering existing accurate values of the 23P fine structure, we measure a centroid value of the 23S-23P frequency of 276 736 495 624.6(2.4) kHz, improving the previous interferometric measurement by 30 times. New accurate values of the 23S-23P and 23P Lamb-shift energies are obtained. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.023001
DOI:
10.1103/PhysRevLett.92.023001
PACS:
31.30.Jv, 06.30.Ft, 42.62.Eh
See AlsoErratum: P. Cancio Pastor, G. Giusfredi, P. De Natale, G. Hagel, C. de Mauro, and M. Inguscio, Erratum: Absolute Frequency Measurements of the 2 3S1→2 3P0,1,2 Atomic Helium Transitions around 1083 nm [Phys. Rev. Lett. 92, 023001 (2004)], Phys. Rev. Lett. 97, 139903 (2006). |
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