Volume 65, Number 2, January 2004
|Page(s)||172 - 178|
|Published online||01 January 2004|
Absolute frequency measurements of the lines in , , and with uncertainty
Department of Physics, Indian Institute of Science - Bangalore 560 012, India
Corresponding author: firstname.lastname@example.org
Accepted: 7 November 2003
We report values for the D1-line frequencies with 0.13 uncertainty in the alkali atoms , , and . The frequencies are measured using an evacuated ring-cavity resonator whose length is calibrated against a reference laser locked to the D2 line in . The measured frequencies, along with sub-ppb measurement of the atomic masses reported previously, form important links in a possible high-precision determination of the fine-structure constant using the photon-recoil shift measured in an atom interferometer. We also obtain, with improved precision, the hyperfine-coupling constants in the state of these atoms, and the fine-structure interval in the state of .
PACS: 06.30.Ft – Time and frequency / 06.20.Jr – Determination of fundamental constants / 32.10.Fn – Fine and hyperfine structure
© EDP Sciences, 2004
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