摘要
用直流放电产生ＣＦ２自由基，在超声射流冷却下获得了ＣＦ２Ａ１Ｂ１←Ｘ１Ａ１２５０ｎｍ附近的激光诱导荧光激发谱。对不同带系的３９个振动带做了归属，其中２３个振动带是新标识的。澄清了前人对ＣＦ２Ａ←Ｘ跃迁的一些不能肯定的归属。对Ｋ结构分辨谱的近１００个子带的分析，从实验上确定了ＣＦ２Ａ态两个伸缩振动频率分别是ν′１＝１０１２．１ｃｍ－１，ν′３＝１１８０．２ｃｍ－１。并获得了一些新的分子常数。
Laser induced fluorescence excitation spectrum of CF 2A 1B 1←X 1A 1 around 250nm has been measured under the supersonic free jet conditions。CF is produced by DC discharge of CF seeded in argon gas with a ratio of 1/40 39 vibronic bands belonging to the different band systems are assigned in which 23 vibronic bands are first labeled The previously indefinite assignments are conclusively labeled,Through analysis of the K structure resolved spectra,especially,observations of the combination excitation of symmetric mode and bend mode,vibronic assignments of the observed band sys tems are confirmed And CF A state stretching frequencies are first expermentaly determined to be =1012 1cm, =1180 2 These can not support King's tentative assignments,But are in good agreement with Cameron's calculated results Furthermore,some new molecular constants are obtained
基金
国家自然科学基金
