High-resolution two-photon millimetre spectroscopy in sodium Rydberg states: possible applications to metrology
- 14 February 1980
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 13 (3) , L83-L91
- https://doi.org/10.1088/0022-3700/13/3/001
Abstract
The authors have observed very narrow two-photon millimetre resonances in sodium, corresponding to nS to (n+1)S transitions (principal quantum number n ranging from 32 to 40). The linewidth, of the order of 10 kHz for frequencies around 100 GHz, is transit-time limited. The variation with n of the quantum defects in the nS series is studied. The precision of the experiments can still be improved and applications to metrology and to a direct frequency determination of the Rydberg constant are possible.Keywords
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