Laser Spectroscopy of ScF: Analysis of Perturbations in the F1Φ-A1Δ System

Abstract

The wavelength-resolved fluorescence excitation technique was used to record the 0-0 and 1-1 bands of the ScF F1Φ-A1Δ transition at a resolution of 0.03 cm−1. Ω assignments were unambiguously determined from observations of the first lines in at least two rotational branches. Accurate term energies and rotational constants are reported. Perturbations in the F1Φ state, caused by interactions with the h3Π2 state, were analyzed. Using a method based on Franck-Condon factors, the vibrational numbering in the perturbing h3Π2 state was estimated. Parameters determined from the spectroscopic analyses were in good agreement with the results from the ab initio calculations of S. R. Langhoff, C. W. Bauschlicher, Jr., and H. Partridge (J. Chem. Phys.89, 396-407, 1988).