THE LASER-INDUCED FLUORESCENCE SPECTROSCOPY APPROACH OF ANALYZING AND IDENTIFYING OVERLAPPING AND PERTURBING BANDS——THE STUDY OF A^2∏—X^2∑ PERTURBING OVERTONES OF CaOH RADICAL

The perturbations in molecular spectra are complex and important phenomena, the study of which remains very difficult so far. CaOHA2Π-X2∑△V1=1 and △V2=2 transitions, which appear in the 16530—16730 cm-1 region and are perturbed by Fermi resonances, have been investigated by using four different ways of laser-induced fluorescence （LIF） spectroscopy. Preliminary assignments are made. The combination