Journal of Chemical Physics, Vol.106, No.17, 6863-6877, 1997
Rovibronic Analysis of the Laser-Induced Fluorescence Excitation Spectrum of the Jet-Cooled Methoxy Radical
The laser induced fluorescence excitation spectrum for the (A) over tilde (2)A(1)<->(X) over tilde(2)E transition of the methoxy radical has been reinvestigated. An extensive set of vibrational levels has been assigned with the aid of increased vibrational and rotational cooling. Many of these vibrational assignments are confirmed by rotational analysis of bands involving both the symmetric and asymmetric fundamentals of the (A) over tilde state as well as vibrations containing two quanta of the e modes. Although parts of the vibrational structure have been assigned previously, several discrepancies are identified and corrected. Vibrational frequencies have been obtained for all the modes in the (A) over tilde (2)A(1) State of the molecule. The Fermi resonance that exists between nu(3) and nu(2), has been investigated and interaction constants describing it have been obtained.
Keywords:POTENTIAL-ENERGY SURFACE;VIBRONIC ANALYSIS;SUPERSONIC JET;SPIN-ORBIT;CH3O;SPECTROSCOPY;STATE;EMISSION;PREDISSOCIATION;ARGON