Determination of the Rydberg Constant by Doppler-Free Two-Photon Spectroscopy of Atomic Hydrogen Rydberg States

  • M. Allegrini
  • F. Biraben
  • B. Cagnac
  • J. C. Garreau
  • L. Julien


During the last ten years several laser measurements of the Rydberg constant [1–8] have improved its accuracy from 3 parts in 108 to few parts in 1010 and the discrepancies among absolute values are now removed. Indeed recent measurements of \({R_\infty }\)(see table 1), obtained from the study of different transitions in atomic hydrogen and deuterium, agree very well each with other . The accuracy of all these measurements is approaching the precision (1.6 x 10−10) of the I2-stabilized He-Ne laser which serves as primary frequency/wavelength standard in the visible region.


Atomic Beam European Economic Community Optical Frequency Standard Rydberg Constant Standard Laser 
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Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • M. Allegrini
    • 1
  • F. Biraben
    • 2
  • B. Cagnac
    • 2
  • J. C. Garreau
    • 2
  • L. Julien
    • 2
  1. 1.Istituto di Fisica Atomica e Molecolare del C.N.R.PisaItaly
  2. 2.Laboratoire de Spectroscopie Hertzienne de 1’E.N.S.Paris Cedex 05France

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