A molecular beam optical and rf-optical double resonance spectroscopic study of numerous vibrational components in the A2Π3/2- X2Σ+ subband of gas phase YO has been performed. The fine and magnetic hyperfine parameters for v=0-4 of the X2Σ + state have been determined. The observed strong vibrational dependence of the spin-rotation parameter γ(X2Σ +) is proposed to arise from a perturbation from two as yet unobserved low-lying 2Π states coming from a three open-shell configuration. The magnetic hyperfine parameters for the X2Σ + state can be interpreted in terms of a single unpaired electron model. An estimate for the A2Π excited state dipolar parameter has been established.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry