Thermal Hyperthermal Collision Dynamics of Atmospheric Species
Abstract
Shot-noise limited, direct absorption IR laser methods have been used to study (i) state-to-state reaction dynamics in crossed supersonic jets and (ii) temperature dependent studies of OH + O(3) chemical chain reaction kinetics via flash kinetic spectroscopy. In this first area. state-resolved studies of F + H(2) scattering have been completed from E = 2.4 kcal/mole down to 0.30 kcals/mole, which by virtue of the high quantum state resolution in product detection have revealed contributions due to non-adiabotic reactions with spin orbit excited F atoms. These methods have been extended to F + CH(4), where high resolution IR laser Dopplerimetry can be used to extract product state velocities and thus differential cross section information at the state-to-stale level. Time-resolved flash kinetic studies of the OH/HO(2)/O(3) chemical chain reaction has been performed from 300 K down 0 190 K. providing first access to temperature conditions relevant to accurate modeling of the lower stratosphere. These methods have been extended to study "airglow' dynamics of highly rotationally excited OH(v.N) radicals formed from H + O(3) reactions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2000
- Accession Number
- ADA379245
Entities
People
- Bill Chapman
- Brad Blackman
- David J. Nesbitt
- Sergey Nizkorodov
- Warren Harper
Organizations
- JILA