rf spectroscopy in an atomic fountain.
作者： Mark A. Kasevich , Erling Riis , Steven Chu , Ralph G. DeVoe
DOI: 10.1103/PHYSREVLETT.63.612
关键词: Physics 、 Atomic physics 、 Spectroscopy 、 Radiation pressure 、 Optics 、 Line (formation) 、 Hyperfine structure 、 Spectral line 、 Laser linewidth 、 Center (category theory) 、 Atomic fountain
摘要: Laser-cooled sodium atoms pushed up on a vertical trajectory by radiation pressure are observed to turn around due gravity. The reatively long time the spent freely falling in this ``atomic fountain'' allowed ground-state hyperfine splitting be measured with linewidth of 2 Hz. After 1000-s integration time, center line was resolved \ifmmode\pm\else\textpm\fi{}10 mHz. absolute 1 771 626 129(2)
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