Dempsey, L.P., Murray, C. and Lester, M.I. (2007) Product branching between reactive and nonreactive pathways in the collisional quenching of OH A2Σ+ radicals by H2. Journal of Chemical Physics, 127(15), p. 151101. (doi: 10.1063/1.2800316)
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Abstract
The collisional quenching of OH radicals in their excited A<sup>2</sup>Σ<sup>+</sup> electronic state by molecular hydrogen is examined to determine the partitioning between reactive and nonreactive pathways. This is achieved using a pump-probe laser technique to compare the population prepared in the excited OH A<sup>2</sup>Σ<sup>+</sup> state with that produced in the OH X <sup>2</sup>Π ground state from nonreactive quenching. Only a small fraction of the products, less than 15%, arise from nonreactive quenching; reactive quenching is the dominant product channel. The branching between the product channels provides a new dynamical signature of the conical intersection region(s) that couple the excited state potential for OH A<sup>2</sup>Σ<sup>+</sup>+H<sub>2</sub> with OH X <sup>2</sup>Π+H<sub>2</sub> and H<sub>2</sub>O+H products.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Murray, Dr Craig |
| Authors: | Dempsey, L.P., Murray, C., and Lester, M.I. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Journal of Chemical Physics |
| ISSN: | 0021-9606 |
| Published Online: | 17 October 2007 |
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