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首页> 美国政府科技报告 >Hyperfine-Structure Investigation of Highly Excited D2 Levels in Rb87 and Cs133 using a CW Tunable Dye Laser in a Two-Step Excitation Scheme.
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Hyperfine-Structure Investigation of Highly Excited D2 Levels in Rb87 and Cs133 using a CW Tunable Dye Laser in a Two-Step Excitation Scheme.

机译：在两步激励方案中使用CW可调染料激光器对Rb87和Cs133中高激发D2电平的超精细结构研究。

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The alkali-metal atoms have a particularly simple electronic structure and a very detailed theoretical understanding of their properties could perhaps be expected. An atom with a single electron moving in the combined potential from the nucleus and a core of closed electron shells is certainly well understood and an accurate diagram of electronic energy levels can be constructed without too much effort. The spin dependence of the exchange forces between the valence electron and the individual core electrons can, however, give rise to an imbalance (polarization) in the closed electron shells, which can be interpreted in terms of excitation of core electrons to outer orbits. Whereas such core excitations have a minor effect on the gross features in the energy-level diagram, such atomic parameters as fine- and hyperfine-structure coupling constants can be appreciably affected. The breakdown of a pure one-electron description of the alkali atom is evident from a study of the fine-structure intervals for D and F doublets. Many of these doublets are anomalously narrow or even inverted. Investigations of the hyperfine structure (hfs) of excited states in alkali atoms are of great interest not only from the point of view of an understanding of the basic atomic interactions, but also for the determination of nuclear moments.

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