Effect of Reagent Rotational Excitation on Dynamics of F+H2→HF+H

The dynamics of the F+H2(v=0, j=0, 1) reactions have been studied at the collision energy of 1.27 kcal/mol using a high-resolution crossed molecular beam apparatus. HF product rotational state resolved differential cross sections have been obtained at the v′=1, 2, 3 levels. The product HF(v′=2) angu...

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Bibliographic Details
Published in:Chinese journal of chemical physics 2015-08, Vol.28 (4), p.471-475
Main Authors: Yang, Tian-gang, Huang, Long, Xie, Yu-run, Wang, Tao, Xiao, Chun-lei, Sun, Zhi-gang, Dai, Dong-xu, Chen, Mao-du, Zhang, Dong H., Yang, Xue-ming
Format: Article
Language:chi ; eng
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Summary:The dynamics of the F+H2(v=0, j=0, 1) reactions have been studied at the collision energy of 1.27 kcal/mol using a high-resolution crossed molecular beam apparatus. HF product rotational state resolved differential cross sections have been obtained at the v′=1, 2, 3 levels. The product HF(v′=2) angular distributions are predominantly backward scattered for both H2 (j=0, 1) reagents. However, the distributions of product HF(v′=2) rotational states for the F+H2(v=0, j=0) reaction are significantly different from those for the F+H2(v=0, j=1) reaction. Experimental results show that the rotational excitation of H2 produces rotationally ‘hotter' HF(v′=2) product. In addition, the HF(v′=3) product is more likely scattered into the forward direction when the H2 reagent is populated at j=0 state, which could be attributed to a slow-down mechanism.
ISSN:1674-0068
2327-2244
DOI:10.1063/1674-0068/28/cjcp1505111