1. Renner-Teller effect on dissociative electron attachment to carbon dioxide.
- Author
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Bin Wu, Lei Xia, Yong-Feng Wang, Hong-Kai Li, Xian-Jin Zeng, and Shan Xi Tian
- Subjects
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DISSOCIATION (Chemistry) , *CARBON dioxide , *CHEMICAL bonds , *POTENTIAL energy surfaces , *ANGULAR distribution (Nuclear physics) , *ANGULAR momentum (Nuclear physics) , *ANIONS , *ELECTRONS - Abstract
Stereodynamics of dissociative electron attachment to CO2 is investigated using O- anion velocity imaging experiments. Here 2&Pgr;g as a Feshbach resonant state of C02- is confirmed to play a role in the dissociation CO2- → CO(1&Sgr;+) + 0-(2P) around 8.0 eV. At the lower energy, 7.7 eV, two split states of 2Ilg due to the Renner-Teller effect are found to couple with the dissociation path; while above this energy, at 8.2 and 8.7 eV, the coupling between the dissociation and the C-O bond stretching becomes predominant. The evolutions of the potential energy surface around this Feshbach resonant state result in the dramatically different angular distributions of the O- momentum. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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