期刊
JOURNAL OF CHEMICAL PHYSICS
卷 129, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.2981063
关键词
-
资金
- Department of Energy [DE-FG02-05ER15694]
State-to-state differential and integral cross sections for the title reaction have been calculated using a dynamically exact quantum mechanical wave packet method on the ab initio ground H2O(X(1)A') electronic state potential energy surface of Dobbyn and Knowles. We focus on the energy dependence of the cross sections up to 0.15 eV. The total integral cross section and rate constant, obtained by summing the state-to-state integral cross sections over all open product rovibrational channels, are in excellent agreement with experimental measurements. Also in agreement with experimental data, the OH product is found to have highly inverted rotational state distributions and monotonically decaying vibrational state distributions. The calculated total differential cross section is roughly forward-backward symmetric, consistent with experimental data. The vibrational state-resolved differential cross sections are found to depend on the collision energy. The calculated results confirm the dominance of the insertion mechanism and provide a stringent test of the potential energy surface. (C) 2008 American Institute of Physics.
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