超声射流CCl_2自由基激光诱导荧光激发谱  

Laser Induced Fluorescence Excitation Spectra of CCl_2 in a Supersonic Jet-cooled

作　　者：高义德[1] 胡长进[1] 冉琴[1] 陈旸[1] 陈从香[1] 

机构地区：[1]中国科学院选键化学开放实验室

出　　处：《Chinese Journal of Chemical Physics》2002年第1期5-10,共6页化学物理学报（英文）

基　　金：国家自然科学基金资助项目 (2 99730 380 ;10 0 32 0 5 0 ) ;国家重点基础研究专项基金资助项目 (G19990 75 30 4)~~

摘　　要：用CCl4 /Ar混合气体脉冲直流高压放电产生CCl2 自由基 ,在超声射流冷却下获得了CCl2 A 1B1- X 1A14 40～ 5 80nm的K 结构分辨的激光诱导荧光激发谱 .通过K 结构分辨谱的分析 ,对 72 2条转动子谱带进行了归属 ,得到了激发态CCl2 A 1　B1的两个全对称振动模式的振动频率、非谐性常数和转动常数差值 ,即激发态的振动频率ω1=6 31.2 0cm-1,ω2 =30 2 .0 0cm-1,A′-B′ =3.476cm-1.CCl2 was produced by de discharge of CCl4 seeded in Argon gas with a ratio of 1/50. Laser induced fluorescence excitation spectrum of CCl2 (A) over tilde (1) B-1 - (X) over tilde (1)A(1) between 440 similar to 580 nm has been measured under the supersonic free-jet conditions. The K-structures of (nu(1), nu(2), nu(3)) - ( 0, 0, 0) bands were clearly resolved and assigned to 722 subbands. The vibrational frequencies, omega(1), 631.20 cm(-1), omega(2) = 302.00 cm(-1), and A' - B' = 3. 476 cm(-1) in the excited state were obtained.

关 键 词：CCL2自由基 超声射流冷却 激光诱导荧光激发谱 K-结构分辨谱 卡宾 振动频率 

分 类 号：O657.3[理学—分析化学]