Observation of a motional Stark effect to determine the second-order Doppler effect

The high resolution two-photon spectroscopy of hydrogen is often limited by the second-order Doppler effect. To determine this effect, we apply a magnetic field perpendicular to the atomic beam. This field induces a quadratic motional Stark shift proportional, as the second-order Doppler effect, to...

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Bibliographic Details
Published in:Physical review letters 2002-11, Vol.89 (20), p.203001-203001, Article 203001
Main Authors: Hagel, G, Battesti, R, Nez, F, Julien, L, Biraben, F
Format: Article
Language:English
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Summary:The high resolution two-photon spectroscopy of hydrogen is often limited by the second-order Doppler effect. To determine this effect, we apply a magnetic field perpendicular to the atomic beam. This field induces a quadratic motional Stark shift proportional, as the second-order Doppler effect, to v(2) (v atomic velocity). For some magnetic field, these two effects are opposite and the total shift due to the atomic velocity is reduced. We present the first observation of this effect for the 1S-3S transition in hydrogen.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.89.203001