超声射流中CS_2分子转动弛豫的研究  

Resolved Rotational Relaxation of CS_2 in Argon Free Jet

作　　者：张清[1] 张志萍[2] 戴静华[2] 刘世林[2] 

机构地区：[1]华东冶金学院,马鞍山243000 [2]中国科学技术大学化学物理系,合肥230026

出　　处：《Chinese Journal of Chemical Physics》1999年第3期265-268,共4页化学物理学报（英文）

基　　金：国家自然科学基金

摘　　要：通过ＣＳ２分子３５２．４—３５２．７ｎｍ的Ｒ３Ｂ２（１５０）　Ｘ１（０，０，０）激光诱导荧光（ＬＩＦ）激发谱，测量了沿超声射流轴线上Ｘ／Ｄ＝３～１５的１９个不同点处ＣＳ２分子的转动温度，得到转动温度随平动温度的变化关系，进而由弛豫方程得到转动弛豫几率与平动温度的关系。结果表明，在低温范围内随着温度的降低，转动弛豫几率增大，说明吸引力对付能过程起主导作用。Rotational relaxation of CS2, in argon free jet was studied using laser-inducedflorescence (LIF) excitation spectrum of the R3B2(150) X1Zg+ (0, 0, 0) band in the range of352.4 - 352.7nm. The rotational temperatures Tr were derived from the LIF spectra detCected at19 different points along the jet axis from X/D =3 to 15. Then the variation of Tr with thetransitional temperature T was obtained. Based on the relaxation equation, the relationship between the rotation-translation relaxation probability PR-T and T was derived. The result showsthat in the range of low T, PR-T probability increases with the decreasing of T, indicating thatthe attracting force between CS2 and Ar plays a major role in the relaxation process.

关 键 词：激光诱导荧光 转动弛豫 二硫化碳 超声射流 

分 类 号：O613.71[理学—无机化学]