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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.
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