REACTION DYNAMICS OF VIBRATIONALLY EXCITED H2

被引:21
作者
MIKULECKY, K
GERICKE, KH
机构
关键词
D O I
10.1016/0301-0104(93)80225-X
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The quantum state resolved product state distribution of the reactions O(1D)+H-2(nu=0,1)-->OH(2PI, nu, J, OMEGA, LAMBDA)+H and C(1D)+H-2(nu=0,1)-->CH(2PI, nu, J, OMEGA, LAMBDA)+H were analysed by laser-induced fluorescence. For studying the influence of vibrational excitation on the reaction dynamics, H-2 was excited to its first vibrational state via stimulated Raman pumping. For both reactions H-2(nu=1) increases the reaction rate, but diminishes the LAMBDA selectivity. Insertion of the atomic collision partner into the H-2 bond is the major reaction mechanism, but the probability for an abstraction process seems to increase when H-2 is vibrationally excited. The influence of translational energy on the reaction dynamics is observed for product states near the energetical limit. In the case of O(1D)+H-2 a significant amount of collision energy is transferred into OH rotation, while the reaction of C(1D)+H-2 transfers translational energy into vibrationally excited CH products.
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页码:13 / 21
页数:9
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