Computer Science
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3077..129l&link_type=abstract
In NASA, Goddard Space Flight Center, First International Conference on Laboratory Research for Planetary Atmospheres p 129-140
Computer Science
Atmospheric Chemistry, Fourier Transformation, Infrared Spectra, Kinetics, Laser Outputs, Laser Spectroscopy, Photochemical Reactions, Planetary Atmospheres, Reaction Kinetics, Acetylene, Color Centers, Comets, Cyclic Hydrocarbons, Emission Spectra, Photodissociation, Semiconductor Lasers, Tunable Lasers, Velocity Distribution
Scientific paper
Several techniques are discussed which can be used to explore laboratory photochemical processes and kinetics relevant to planetary atmospheres; these include time-resolved laser gain-versus-absorption spectroscopy and time-resolved Fourier transform infrared (FTIR) emission studies. The laser gain-versus-absorption method employed tunable diode and F-center lasers to determine the yields of excited photofragments and their kinetics. The time-resolved FTIR technique synchronizes the sweep of a commercial FTIR with a pulsed source of light to obtain emission spectra of novel transient species in the infrared. These methods are presently being employed to investigate molecular photodissociation, the yields of excited states of fragments, their subsequent reaction kinetics, Doppler velocity distributions, and velocity-changing collisions of translationally fast atoms. Such techniques may be employed in future investigations of planetary atmospheres, for example to study polycyclic aromatic hydrocarbons related to cometary emissions, to analyze acetylene decomposition products and reactions, and to determine spectral features in the near infrared and infrared wavelength regions for planetary molecules and clusters.
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