title: High resolution laser induced fluorescence spectroscopy of the [18.8] 3Phi(i)-X 3Phi(i) (0,0) band of cobalt monofluoride.
abstract: The fine and hyperfine interaction parameters in the [18.8] (3)Phi (upsilon=0) and X (3)Phi (upsilon=0) states of cobalt monofluoride, CoF, have been determined from an analysis of high-resolution laser induced fluorescence spectra of the [18.8] (3)Phi(3)-X (3)Phi(3) and [18.8] (3)Phi(4)-X (3)Phi(4) band systems. The previously reported pure rotational transitions of the X (3)Phi(4)(upsilon=0) state [T. Okabayashi and M. Tanimoto, J. Mol. Spectrosc. 221, 149 (2003)] were included in the data set. The hyperfine parameters for (59)Co (I=72) and (19)F (I=12) have been interpreted using atomic data together with a proposed molecular orbital description for the [18.8](3)Phi(i) and X (3)Phi(i) states. A comparison of the hyperfine parameters in the X (3)Phi state of cobalt monohydride, CoH, with those of the X (3)Phi state of CoF reveals that the bonding in the two molecules is significantly different. It is shown that, in a situation where the Omega 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.
authors.affiliation: Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA. tsteimle@asu.edu
authors.forename: Timothy C
authors.initials: TC
authors.lastname: Steimle
authors.forename: Tongmei
authors.initials: T
authors.lastname: Ma
authors.forename: Allan G
authors.initials: AG
authors.lastname: Adam
authors.forename: William D
authors.initials: WD
authors.lastname: Hamilton
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Merer