A Preliminary Measurement of the Fine Structure Constant Based on Atom Interferometry

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Published under licence by IOP Publishing Ltd
, , Citation Andreas Wicht et al 2002 Phys. Scr. 2002 82 DOI 10.1238/Physica.Topical.102a00082

1402-4896/2002/T102/82

Abstract

Using an atom interferometer method, we measure the recoil velocity of a cesium atom due to the coherent scattering of a photon. This measurement is used to obtain a value of ℏ/MCs and the fine structure constant, α. The current fractional uncertainty is Δα/α = 7.4 × 10-9.

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10.1238/Physica.Topical.102a00082