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High resolution laser spectroscopy of spatially restricted hot alkali atomic and dimer vapor

机译:空间受限热碱原子和二聚体蒸气的高分辨率激光光谱

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摘要

In this paper we discuss a novel use of a Cs-filled optical cell with micrometric thickness. The cell intrinsically contains an extremely small number of Rb atoms. When heated up to temperatures around 350 ℃, the vapor in the cell consists of: (i) Cs atoms, (ii) an order of magnitude lower concentration Cs_2 dimers and (iii) a small number of Rb atoms. This mixture is a high density but optically thin alkali vapor layer, and the produced complex ensemble of Cs_2 diatomic molecules, together with Rubidium and Cesium atoms can be investigated by means of linearonlinear spectroscopy. In this work we study the fluorescence and selective reflection spectral profiles of Rb atoms in the presence of high-density Cs atoms considered as a buffer gas for the Rb atoms and Cs dimers. In addition, the Rb hyperfine transition spectrum is used as a precise frequency reference for the measurement of the spectral profile widths and the frequency positions of the experimentally registered spectral lines of Cs_2 molecules in the spectral region around the Rb D_2 resonance line.
机译:在本文中,我们讨论了具有微米厚度的Cs填充光学电池的新颖用途。该单元本质上包含极少数的Rb原子。当加热到大约350℃的温度时,电池中的蒸气由以下成分组成:(i)Cs原子,(ii)浓度降低一个数量级的Cs_2二聚体,以及(iii)少量Rb原子。该混合物是高密度但光学上较薄的碱蒸汽层,并且可以通过线性/非线性光谱法研究所产生的Cs_2双原子分子与Rub和铯原子的复杂整体。在这项工作中,我们研究了在高密度Cs原子存在下Rb原子的荧光和选择性反射光谱图,该高密度Cs原子被视为Rb原子和Cs二聚体的缓冲气体。此外,Rb超精细跃迁光谱被用作精确的频率参考,用于测量Rb D_2共振线周围光谱区域中Cs_2分子的光谱分布宽度和实验配准的光谱线的频率位置。

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