Reaction dynamics, OH energy partitioning, and OH product angular momentum alignment studies: H+H2O→OH+H2 versus H+CO2→OH+CO
1994; Elsevier BV; Volume: 218; Issue: 1-2 Linguagem: Inglês
10.1016/0009-2614(93)e1462-p
ISSN1873-4448
AutoresA. Jacobs, Hans‐Robert Volpp, J. Wolfrum,
Tópico(s)Atmospheric chemistry and aerosols
ResumoUsing translationally excited H atoms generated by laser photolysis of H2S at 193 nm, the reaction dynamics of H+H2O→OH+H2 and H+CO2→OH+CO was investigated at collision energies of 2.2 and 2.3 eV, respectively. Nascent OH rotational and vibrational quantum-state distributions and OH product translational energies were measured by means of the laser photolysis/laser-induced fluorescence pump-probe technique. A markedly non-statistical distribution of the available energy was found: H+H2O→OH+H2: frot=0.04±0.01, fvib<4×10−3, ftrans=0.65±0.26; H+CO2→OH+CO: frot=0.14±0.02, fvib=0.11 ±0.04, ftrans=0.59±0.16. In addition, velocity-aligned H atoms generated via polarized H2S photodissociation were used to investigate vector correlations for both reactions.
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