Vibrational Relaxation of OH(v) in Collisions With O2 Molecules
Abstract
The reaction between hydrogen atoms and ozone is the single most important source of vibrationally excited hydroxyl radicals near the mesopause. The reaction yields OH molecules in vibrational levels up to v=9. The subsequent chemistry of OH depends on its vibrational excitation. Collisions with O2 molecules are considered to be the dominant mechanism of vibrational relaxation of OH in the mesosphere. We have carried out mixed-quantum classical calculations of vibrational relaxation of OH(v=1-6) in collisions with O2 molecules. We present cross sections and rate coefficient for the vibrational quenching process at temperatures of interest in the mesosphere. This work was supported by NSF grant No. ATM-0205199.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2004
- Bibcode:
- 2004AGUFMSA11A1109S
- Keywords:
-
- 0310 Airglow and aurora;
- 0317 Chemical kinetic and photochemical properties;
- 0340 Middle atmosphere: composition and chemistry;
- 0342 Middle atmosphere: energy deposition;
- 0343 Planetary atmospheres (5405;
- 5407;
- 5409;
- 5704;
- 5705;
- 5707)