The millimeter-wave spectrum of FeO in its X5Δi state (v = 0): A study of all five spin components

M. D. Allen, Lucy M Ziurys, J. M. Brown

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New millimeter/sub-millimeter pure rotational spectroscopy has been carried out for the FeO radical (X5Δi). The molecule was produced by the reaction of N2O with iron vapor, generated using a Broida-type oven. In addition to verifying previous measurements on FeO in the lower spin-orbit components, transitions originating in the Ω = 0 and 1 ladders have been recorded, for which lambda-type doubling was resolved. Spectra of the 54FeO isotopomer were also measured. The data set was analyzed successfully with a 5Δ Hamiltonian, demonstrating that highly perturbed, complicated electronic ground states can be modeled with effective rotational parameters.

Original languageEnglish (US)
Pages (from-to)130-136
Number of pages7
JournalChemical Physics Letters
Issue number1-2
Publication statusPublished - Jul 19 1996
Externally publishedYes


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

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