超声射流冷却CCl_2自由基的激光诱导荧光激发谱

LASER-INDUCED FLUORESCENCE EXCITATION SPECTRUM OF CC12 COOLED IN THE SUPERSONIC JET

在497—517nm波长范围观测超声射流冷却CCl_2自由基的激光诱导荧光激发谱。得到CCl_2在A←X跃迁中(v_1,v_2,0)←(0,0,0)振动带清晰的K结构。对近80个子谱带作了归属。振动分析给出较精确的v＇_1和v＇_2振动频率和非谐性常数;从K结构的分析得出(A＇-B＇)和(A＂-B＂)的值,文献未曾报道过。

Laser-induced fluorescence excitaion spectrum of gas-phase dichlocarbene (CC12) cooled in the supersonic jet has been observed in the range of 497-517 nm. The K-structrue of the (v1,v2,0)-(0,0,0) vibrational bands was resolved. About 80 su-bbands were assigned. v_1~'= 643.5cm-1, v'2 = 308.0cm-1 and the anharmonic costants, and (A' - B') = 3.67cm-1, (A' - B') = 1.80cm-1 were obtained from the analysis of spectra.