First measurements of the index of refraction of gases for lithium atomic waves

Details First measurements of the index of refraction of gases for lithium atomic waves First measurements of the index of refraction of gases for lithium atomic waves

2006-11-23

arxiv.org/abs/quant-ph/0611236v2

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.98.240405

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 $\rho$ exhibit glory oscillations.

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