A millimeter/sub-millimeter-wave spectroscopic study of the FeCl radical (X6Δi)
作者:M.D. Allen、B.Z. Li、L.M. Ziurys
DOI:10.1016/s0009-2614(97)00397-7
日期:1997.5
Pure rotational spectroscopy of the FeCl radical (X (6) Delta(i)) has been carried out using millimeter/sub-millimeter direct absorption techniques. The species was created by the reaction of chlorine with iron vapor, All six spin-orbit components were observed in the majority of the twenty-one rotational transitions recorded. Chlorine hyperfine structure was resolved in the Omega = 9/2 and 7/2 components, and lambda-type doubling observed in the Omega = 3/2, 1/2, and - 1/2 ladders. The data were analyzed with a (6) Delta Hamiltonian, and rotational, fine structure, lambda-doubling, and hyperfine parameters determined. The hyperfine and lambda-doubling interactions in FeCl appear to be different from those in the FeF radical.
The rotational spectrum of the FeCl radical in the electronic groundstate was observed by using a source-modulated millimeter-wave spectrometer. This species was produced in a free-space cell by glow-discharging a mixture of helium and aluminum trichloride vapor. Iron atoms were extracted during the discharge from the stainless-steel electrodes in the cell. The spectrum was observed for the two lowest-lying