1. Dynamics of the O(3P)+H2 reaction at low temperatures: Comparison of quasiclassical trajectory with quantum scattering calculations.
- Author
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Weck, P. F., Balakrishnan, N., Brandão, J., Rosa, C., and Wang, W.
- Subjects
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ENERGY levels (Quantum mechanics) , *QUANTUM theory , *SCATTERING (Physics) , *QUANTUM tunneling , *ANGULAR momentum (Mechanics) , *ELECTRIC conductivity - Abstract
Quasiclassical trajectory and quantum-mechanical scattering calculations are reported for the O(³P)+H2(X ¹Σg + ; υ=1-3, j=0)→?OH(X ²II)+H(²S) reaction at energies close to the reaction threshold. The dynamics of the reaction have been investigated for zero total angular momentum using the lowest ³A" potential-energy surface developed by Rogers et al. [J. Phys. Chem. A 104, 2308 (2000)] and its recent extensions by Brandão et al. [J. Chem. Phys. 121, 8861 (2004)] which provide an improved description of the van der Waals interaction. Good agreement is observed for this system between quasiclassical and quantal results for incident kinetic energies above the tunneling regime. Quantum-mechanical calculations also confirm recent theoretical predictions of a strong collision-energy dependence of the OH(υ'=0)/OH(υ'=1) product branching ratio in the O(³P)+H2(υ=1) reaction, which explains the differences observed in OH vibrational populations between experiments using different O(³P) sources. [ABSTRACT FROM AUTHOR] more...
- Published
- 2006
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