Quantum Calculations of Quenching of Vibrationally Excited OH in Collisions With Atomic Oxygen

Details Quantum Calculations of Quenching of Vibrationally Excited OH in Collisions With Atomic Oxygen Quantum Calculations of Quenching of Vibrationally Excited OH in Collisions With Atomic Oxygen

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51b1950n&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA51B-1950

Physics

[0310] Atmospheric Composition And Structure / Airglow And Aurora, [0317] Atmospheric Composition And Structure / Chemical Kinetic And Photochemical Properties, [0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry, [0342] Atmospheric Composition And Structure / Middle Atmosphere: Energy Deposition

Scientific paper

Reaction between atomic hydrogen and ozone is an important source of vibrationally excited OH in the mesosphere. Radiative decay of vibrationally excited OH competes with collisional quenching by atomic and molecular oxygen and to a lesser extent by molecular nitrogen. Here we present the first explicit quantum mechanical investigation of quenching of vibrationally excited OH(v=1) by collisions with atomic oxygen. We explore both non-reactive quenching to OH(v=0) and reactive collisions leading to H+O2. It is found that the branching between reactive and non-reactive channels is strongly influenced by long-range dipole-quadrupole forces in the O+OH channel. The computed results are found to be in close agreement with available experimental results. This work was supported by NSF grant ATM-0635715.

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