Determination of the Rydberg constant by direct frequency measurement

Year: 1995

Authors: Nez F., Plimmer M.D., Bourzeix S., Julien L., Biraben F., Felder R., Millerioux Y., De Natale P.

Autors Affiliation: Laboratoire Kastler Brossel, Laboratoire de l’ecole Normale Superieure et de l’Universitè P. e M. Curie, 75252 Paris, France
Bureau Int. des Poides et Mesures, F-92312 Sevres, France;
BNM, Institut National de Metrologie, F-75141 Paris 03, France; European Laboratory for Nonlinear Spectroscopy (LENS) Largo E. Fermi 2, 50125 Firenze, Italy
European Laboratory for Nonlinear Spectroscopy (LENS) Largo E. Fermi 2, 50125 Firenze, Italy

Abstract: We have built a frequency chain to connect the frequencies of the 2S-8S/D two-photon transitions in hydrogen to two optical standards, the methane-stabilized He-Ne laser and the iodine-stabilized He-Ne laser. In this way, an optical frequency of atomic hydrogen is directly linked for the first time to the cesium clock without any interferometry. We deduce a new value for the Rydberg constant with an uncertainty of 2.2 parts in 10(11). This value is in very good agreement with published values. The same frequency scheme has been used to measure the frequencies of the 5S-5D two-photon transition in rubidium and 2(3)S(1-)3(3)P(o) in helium.

Journal/Review: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT

Volume: 44 (2)      Pages from: 568  to: 571

More Information: This work was supported in part by the Bureau National de MCtrologie, by the Direction des Recherches et Etudes Techniques, and by the European Community in the framework of SCIENCE Cooperation Contract SCI*-CT92-0816.
KeyWords: Atomic physics; Cesium; Electron transitions; Frequency standards; Helium; Helium neon lasers; Hydrogen; Iodine; Methane; Natural frequencies; Rubidium, Cesium clock; Direct frequency measurement; Optical frequency; Optical standards; Photon transition; Rydberg constant, Electric frequency measurement
DOI: 10.1109/19.377909

Citations: 10
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