Scattering of an alkali-metal atomic beam on anti-spin-relaxation coatings
Scattering of an alkali-metal atomic beam on anti-spin-relaxation coatings
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DOI：
10.1103/physreva.98.042709
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发表时间：
2018-07
影响因子：
2.9
通讯作者：
N. Sekiguchi;K. Okuma;H. Usui;A. Hatakeyama
中科院分区：
文献类型：
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作者：
N. Sekiguchi;K. Okuma;H. Usui;A. Hatakeyama
利用Rb原子束对石蜡薄膜进行了散射实验，测量了散射原子的角分布和速度分布。用不同的方法制备了石蜡膜，并用原子力显微镜和X射线衍射仪对其进行了表征。薄膜表现出不同的粗糙度和晶体结构。石蜡膜保留了散射原子的自旋极化。所制备的薄膜的角分布符合Knudsen余弦定律。速度分布与麦克斯韦分布符合得很好，麦克斯韦分布的特点是温度更接近薄膜温度，而不是原子束温度。因此，我们得出结论，Rb原子通过单次散射事件与石蜡薄膜发生了很好的热化。
We performed scattering experiments using a rubidium (Rb) atomic beam on paraffin films and measured the angular and velocity distributions of scattered atoms. The paraffin films were prepared in various ways and characterized by atomic force microscopy and X-ray diffraction. The films exhibited various roughnesses and crystal structures. The paraffin films preserved the spin polarization of the scattered atoms. The measured angular distributions of all prepared films were consistent with Knudsen's cosine law. The velocity distributions were well fitted by Maxwell's distribution, characterized by a temperature much closer to the film temperature than to the atomic-beam temperature. We therefore concluded that the Rb atoms were well thermalized with the paraffin films via single scattering events.