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Phys. Rev. A 61, 044501 (2000) [4 pages]

Measurement of the 2S atomic hydrogen hyperfine interval

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N. E. Rothery and E. A. Hessels
York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3

Received 28 October 1999; published 1 March 2000

The n=2S metastable-state hyperfine interval in atomic hydrogen has been measured to a precision of 160 ppb by driving the magnetic-dipole radio-frequency transition in a thermal beam. The 2S hyperfine interval is found to be 177 556 785±29 Hz which is the most precise measurement of this interval.


©2000 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.61.044501
DOI: 10.1103/PhysRevA.61.044501
PACS: 32.10.Fn, 32.30.Bv

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