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.
基金
国家自然科学基金
关键词
激光诱导荧光
转动弛豫
二硫化碳
超声射流
:Rotational relaxation Laser-induced florescence Rotational temperature R-Ttransition possibility
