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1 Interférométrie LCAR LCAR - Laboratoire Collisions Agregats Reactivite

Abstract : We report here the first measurements of the index of refraction of gases for lithium waves. Using an atom interferometer, we have measured the real and imaginary part of the index of refraction $n$ for argon, krypton and xenon, as a function of the gas density for several velocities of the lithium beam. The linear dependence of $n-1$ with the gas density is well verified. The total collision cross-section deduced from the imaginary part is in very good agreement with traditional measurements of this quantity. Finally, as predicted by theory, the real and imaginary parts of $n-1$ and their ratio $ ho$ exhibit glory oscillations, in good agreement with calculations.

Keywords : lithium glory oscillations atom interferometry index of refraction of gases





Autor: Marion Jacquey - Matthias Büchner - Gérard Trénec - Jacques Vigué -

Fuente: https://hal.archives-ouvertes.fr/



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