The fine and hyperfine interaction parameters in the [18.8] 3Φ (v=0) and X 3Φ (v=0) states of cobalt monofluoride, CoF, have been determined from an analysis of high-resolution laser induced fluorescence spectra of the [18.8] 3Φ 3- X 3Φ 3 and [18.8] 3Φ 4-X 3O 4 band systems. The previously reported pure rotational transitions of the X 3Φ 4(v=0) state [T. Okabayashi and M. Tanimoto, J. Mol. Spectrosc. 221, 149 (2003)] were included in the data set. The hyperfine parameters for 59Co (I=7/2) and 19F (I=1/2) have been interpreted using atomic data together with a proposed molecular orbital description for the [18.8] 3Φ i and X 3Φ i states. A comparison of the hyperfine parameters in the X 3Φ state of cobalt monohydride, CoH, with those of the X 3Φ state of CoF reveals that the bonding in the two molecules is significantly different. It is shown that, in a situation where the Ω substates of a multiplet degenerate electronic state are analyzed separately, the Fermi contact parameter b can be determined with fair accuracy from the apparent centrifugal distortion of the hyperfine structure.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry