Phys. Rev. A 61, 044501 (2000) [4 pages]Measurement of the 2S atomic hydrogen hyperfine intervalReceived 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 177556785±29Hz 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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