锂原子波气体index of refraction的首次测量
First measurements of the index of refraction of gases for lithium atomic waves
摘要：
我们在这里报告的第一次测量的折射率的气体锂波。用原子干涉仪测量了氩、氪和氙的折射率的实部和虚部$n$，它们是锂离子束几种速度下气体密度的函数。很好地验证了$(n-1)$与气体密度的线性关系。从虚部推导出的总碰撞截面与该量的传统测量非常一致。最后，如理论所预测的，$(n-1)$的实部和虚部以及它们的比率$ρ$表现出光荣振荡。
英文摘要：
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 $ρ$ exhibit glory oscillations.
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