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高振动激发态KH(X1Σ+,V=14-21)与CO2碰撞中的振动-转动能量转移

, PP. 648-651

Keywords: 激光光谱,振-转能量转移,转动和平动能,KH-CO2

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Abstract:

利用泵浦-探测技术研究高振动激发态KH(V=14-21)分子与CO2的振动-转动碰撞转移过程。脉冲激光激发KH分子至高位振动态,与CO2发生振动-转动能量转移,使CO2高位转动态得到布居,通过测量CO2(0000,J)转动态分布,得到其平均转动能和平均转动能变化,发现振动量子数V从14增加至21时,CO2平均转动能变化增加了2.33倍;测量CO2转动能级的多普勒增宽吸收线,得到V=14和20时,其获得的平均平动能大体随J增大而线性增大;最后,在单一碰撞条件下,测量KH(V=14-21)与CO2(0000,J)的振动-转动碰撞能量转移速率系数,结果显示V=19的总碰撞速率系数是V=14的4.5倍,而V>19则呈下降趋势。

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