Laser Induced Fluorescence Excitation Spectra of CCl2 in a Supersonic Jet-cooled

CCl2was produced by dc discharge of CCl4seeded in Argon gas with a ratio of 1/50. Laser induced fluorescence excitation spectrum of CCl2~A1B1-~X1A1between 440~580 nm has been measured under the supersonic free-jet conditions. The K-structures of (v1, v2, v3)-( 0, 0, 0 ) bands were clearly resolved and assigned to 722 subbands. The vibrational frequencies,ω1=631.20 cm-1,ω2=302.00 cm-1, andA′-B′=3.476 cm-1in the excited state were obtained.