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首页> 外文期刊>The Journal of Chemical Physics >Investigation of antirelaxation coatings for alkali-metal vapor cells using surface science techniques
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Investigation of antirelaxation coatings for alkali-metal vapor cells using surface science techniques

机译：使用表面科学技术研究碱金属蒸汽电池的防松弛涂层

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摘要

Many technologies based on cells containing alkali-metal atomic vapor benefit from the use of antirelaxation surface coatings in order to preserve atomic spin polarization. In particular, paraffin has been used for this purpose for several decades and has been demonstrated to allow an atom to experience up to 10 000 collisions with the walls of its container without depolarizing, but the details of its operation remain poorly understood. We apply modern surface and bulk techniques to the study of paraffin coatings in order to characterize the properties that enable the effective preservation of alkali spin polarization. These methods include Fourier transform infrared spectroscopy, differential scanning calorimetry, atomic force microscopy, near-edge x-ray absorption fine structure spectroscopy, and x-ray photoelectron spectroscopy. We also compare the light-induced atomic desorption yields of several different paraffin materials. Experimental results include the determination that crystallinity of the coating material is unnecessary, and the detection of CC double bonds present within a particular class of effective paraffin coatings. Further study should lead to the development of more robust paraffin antirelaxation coatings, as well as the design and synthesis of new classes of coating materials.
机译：许多基于含碱金属原子蒸气的电池技术都得益于使用抗松弛表面涂层来保持原子自旋极化。尤其是，石蜡已经为此目的使用了几十年，并且已被证明可以使原子与其容器的壁进行多达10000次碰撞而不会去极化，但是其操作细节仍然知之甚少。我们将现代表面和散装技术应用于石蜡涂层的研究中，以表征能够有效保留碱旋转极化的特性。这些方法包括傅立叶变换红外光谱法，差示扫描量热法，原子力显微镜法，近边缘X射线吸收精细结构光谱法和X射线光电子能谱法。我们还比较了几种不同石蜡材料的光诱导原子解吸产率。实验结果包括确定涂料的结晶度是不必要的，以及检测特定类别的有效石蜡涂料中存在的CC双键。进一步的研究应导致开发更坚固的石蜡抗松弛涂料，以及设计和合成新型涂料。

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