432 citations · 1.8k across the 32 of their papers we have counts for
Showing 2003Show all
3 papers · 1 filter
physics.optics2003★ 432 cited
New Limits to the Drift of Fundamental Constants from Laboratory Measurements
M. Fischer, N. Kolachevsky, M. Zimmermann +17
We have remeasured the absolute - transition frequency in atomic hydrogen. A comparison with the result of the previous measurement performed in 1999 sets a l…
physics.atom-ph2003★ 100 cited
Precision Spectroscopy of Atomic Hydrogen and Variations of Fundamental Constants
M. Fischer, N. Kolachevsky, M. Zimmermann +14
In 2003 we have measured the absolute frequency of the two-photon transition in atomic hydrogen. We observed a variati…
physics.atom-ph2003★ 61 cited
High-Precision Optical Measurement of the 2S Hyperfine Interval in Atomic Hydrogen
N. Kolachevsky, M. Fischer, S. G. Karshenboim +1
We have applied an optical method to the measurement of the 2S hyperfine interval in atomic hydrogen. The interval has been measured by means of two-photon spectroscopy of the 1S-2…