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Product Imaging of Molecular Dynamics Relevant to Combustion.

DE2006860995

Publication Date	2005
Personal Author	Houston, P. L.
Page Count	198
Abstract	Product imaging has been used to investigate several processes important to a fundamental understanding of combustion. The imaging technique produces a snapshot of the three-dimensional velocity distribution of a state-selected reaction product. Research in three main areas is planned or underway. First, product imaging has been used to investigate the reactive scattering of radicals or atoms with species important in combustion. These experiments, while more difficult than studies of inelastic scattering or photodissociation, are now becoming feasible. They provide both product distributions of important processes as well as angular information important to the interpretation of reaction mechanisms. Second, the imaging technique has been used to measure rotationally inelastic energy transfer on collision of closed-shell species with important combustion radicals. Such measurements improve our knowledge of intramolecular potentials and provide important tests of ab initio calculations. Finally, experiments using product imaging have explored the vacuum ultraviolet photodissociation of O2, N2O, SO2, CO2 and other important species. Little is known about the highly excited electronic states of these molecules and, in particular, how they dissociate. These studies provide product vibrational energy distributions as well as angular information that can aid in understanding the symmetry and crossings among the excited electronic states.
Keywords	Imaging techniques Photochemical reactions Reaction mechanics Intramolecular potentials Combustion products Three-dimensional velocity distribution Vibrational energy distributions State-selected reaction product
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Cornell Univ., Ithaca, NY. Dept. of Chemistry.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200620

Product Imaging of Molecular Dynamics Relevant to Combustion.

Product Imaging of Molecular Dynamics Relevant to Combustion.
DE2006860995

Publication Date	2005
Personal Author	Houston, P. L.
Page Count	198
Abstract	Product imaging has been used to investigate several processes important to a fundamental understanding of combustion. The imaging technique produces a snapshot of the three-dimensional velocity distribution of a state-selected reaction product. Research in three main areas is planned or underway. First, product imaging has been used to investigate the reactive scattering of radicals or atoms with species important in combustion. These experiments, while more difficult than studies of inelastic scattering or photodissociation, are now becoming feasible. They provide both product distributions of important processes as well as angular information important to the interpretation of reaction mechanisms. Second, the imaging technique has been used to measure rotationally inelastic energy transfer on collision of closed-shell species with important combustion radicals. Such measurements improve our knowledge of intramolecular potentials and provide important tests of ab initio calculations. Finally, experiments using product imaging have explored the vacuum ultraviolet photodissociation of O2, N2O, SO2, CO2 and other important species. Little is known about the highly excited electronic states of these molecules and, in particular, how they dissociate. These studies provide product vibrational energy distributions as well as angular information that can aid in understanding the symmetry and crossings among the excited electronic states.
Keywords	Imaging techniques Photochemical reactions Reaction mechanics Intramolecular potentials Combustion products Three-dimensional velocity distribution Vibrational energy distributions State-selected reaction product
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Cornell Univ., Ithaca, NY. Dept. of Chemistry.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200620