title: Spectral technique for measuring hyperfine structure of atoms.
abstract: A new spectral technique for measuring the hyperfine structure of atoms is reported. A divergent atomic beam and a divergent laser beam are crossed. Because of the Doppler effect, the hyperfine structure of atomic levels will be directly displayed in the interaction region in the form of spatially resolved fluorescence arc hands. By measuring the spatial-fluorescence intensity distribution, it is possible to obtain the hyperfine splittings of atomic levels. Basic principles and experimental results are given.
authors.forename: W
authors.initials: W
authors.lastname: Yuzhu
authors.forename: Z
authors.initials: Z
authors.lastname: Rufang
authors.forename: Z
authors.initials: Z
authors.lastname: Zhiyiao
authors.forename: N
authors.initials: N
authors.lastname: Guoquan
authors.forename: C
authors.initials: C
authors.lastname: Weiquan