HR: 0800h
AN: SA11A-1109    [Abstracts]
TI: Vibrational Relaxation of OH($v$) in Collisions With O$_2$ Molecules
AU: * Sultanov, R A
EM: sultano2@unlv.nevada.edu
AF: Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154 United States
AU: Naduvalath, B
EM: naduvala@unlv.nevada.edu
AF: Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154 United States
AB: 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 O$_2$ 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 O$_2$ 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.
DE: 0310 Airglow and aurora
DE: 0317 Chemical kinetic and photochemical properties
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0342 Middle atmosphere--energy deposition
DE: 0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707)
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting