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Selective reflection studies of molecular cesium vapor

机译：分子铯蒸气的选择性反射研究

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We report the preliminary results of experimental studies of a dense cesium vapor in all-sapphire sealed-off Cs cell (temperature up to 500 °C, atomic and molecular densities up to 1018 and 3.2x1016 cm-3, respectively) in selective reflection (SR) configuration. Probing the vapor by a 780 nm laser radiation scanned in 20 GHz range, we have observed a spectral structure, which appears in the vapor temperature range of 250 - 400 °C. Though the cell is filled with pure cesium, starting from 300 °C we have revealed a noticeable SR contribution of rubidium atomic D2 line transitions that fall in the laser tuning range. The spectral features observed in present work can be attributed not only to cesium dimers (Cs2) having absorption band in this spectral region, but also to RbCs molecules. Relevant spectroscopic properties of these molecules are also addressed. We believe this is the first observation of selective reflection from the interface of dielectric and molecular vapor. More experiments and theoretical treatment is required to clarify the mechanisms involved and identify the origin of each spectral component, the further work program is outlined.
机译：我们报道了全蓝宝石封闭Cs电池（温度高达500°C，原子和分子密度分别高达1018和3.2x1016 cm-3）中的浓铯蒸气在选择性反射中的实验研究的初步结果（ SR）配置。通过在20 GHz范围内扫描的780 nm激光辐射探测蒸汽，我们观察到了一种光谱结构，该结构出现在250-400°C的蒸汽温度范围内。尽管电解池中充满了纯铯，但从300°C开始，我们发现revealed原子D2线跃迁在激光调谐范围内具有明显的SR贡献。在当前工作中观察到的光谱特征不仅可以归因于在该光谱区域具有吸收带的铯二聚体（Cs2），而且还可以归因于RbCs分子。还讨论了这些分子的相关光谱性质。我们相信这是从介电和分子蒸气的界面进行选择性反射的第一个观察结果。需要更多的实验和理论处理来阐明所涉及的机制并确定每个光谱成分的起源，并概述了进一步的工作程序。

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