Statistics – Methodology
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988colo.reptq....l&link_type=abstract
Final Report, 1 Apr. 1979 - 31 Mar. 1988 Colorado Univ., Boulder.
Statistics
Methodology
Free Radicals, Infrared Spectra, Molecular Rotation, Photochemical Reactions, Polyatomic Molecules, Pulsed Lasers, Vibrational Spectra, Acetylene, Alkanes, Chlorine Compounds, Dye Lasers, Excimer Lasers, Iodides, Mercury Compounds, Methyl Compounds, Neodymium Lasers, Propane, Yag Lasers
Scientific paper
Pulsed lasers were used in this work to photofragment molecules or to initiate chain reactions. One of the major advances was the availability of high-powered rare gas halide excimer lasers. In addition, pulsed Nd:YAG lasers and dye lasers were used throughout. Results include: generalized kinetic formulations of the problem of laser-initiated chain reactions. Several studies were carried out to explore the details of chain combustion phenomena, slow chain reactions, chain branching behavior, and vibrational temperatures of combusting mixtures. A method to determine the rotational temperature of nitrogen molecules by laser multiphoton ionization was shown. The chain reaction methodology was applied to complex polyatomic systems, in which complete infrared spectra of the emitting species were obtained. Systems studied included chlorine + HBr, HI, methane, hydrogen, ethane, propane, butane, cyclopropane, and cyclohexane. Photofragmentation studies involved the production and analysis of radical species, such as methyl, CH2I, and CCH. Molecules studied included methylene iodide, methyl iodide, dimethyl mercury, acetone, acetylene, vinyl chloride, dichloroethylene, and fluorochloroethylene. The first infrared characterization of a highly vibrationally excited radical was shown. Reactions of methyl radicals were studied in detail, in which a new method for obtaining absolute values of the methyl radical reaction rates were obtained.
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