Title :
Determination of the Rydberg constant by direct frequency measurement
Author :
Nez, F. ; Plimmer, M.D. ; Bourzeix, S. ; Julien, L. ; Biraben, F. ; Felder, R. ; Millerioux, Y. ; De Natale, P.
Author_Institution :
Lab. de l´´Ecole Normale Superieure, Univ. Pierre et Marie Curie, Paris, France
fDate :
4/1/1995 12:00:00 AM
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 1011. 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 23 S1-33P0 in helium
Keywords :
Rydberg states; atomic clocks; caesium; constants; frequency measurement; helium neutral atoms; hydrogen neutral atoms; laser beam applications; measurement standards; rubidium; 23S1-33P0; 2S-8S/D two-photon transitions; 5S-5D two-photon transition; Cs; Cs clock; H; He; He-Ne; He-Ne:I2; I2 stabilized He-Ne laser; Rb; Rydberg constant; direct frequency measurement; frequency chain; methane-stabilized He-Ne laser; optical frequency; optical standards; Atom lasers; Atom optics; Atomic beams; Atomic measurements; Frequency measurement; Helium; Hydrogen; Laser transitions; Measurement standards; Optical interferometry;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
