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Laser-spectroscopy measurement of the fine-structure splitting23P1–23P2ofHe4
2015
Physical Review A. Atomic, Molecular, and Optical Physics
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Laser spectroscopy has been performed on a beam of neutral 4 He atoms. By using transverse laser cooling and focusing, we are able to prepare a bright beam of atoms in the metastable state 2 3 S 1 deflected from the original effusive atomic beam. The initial state preparation is completed with optical pumping on the 2 3 P 1 2 3 S 1 transition at the wavelength of 1083 nm, followed by laser spectroscopy on the 2 3 P 1,2 2 3 S 1 transitions. The 2 3 P 1 -2 3 P 2 fine structure splitting is
doi:10.1103/physreva.91.030502
fatcat:qxm6vgodpfha7im32djutkjxwy