Hot atom-laser induced fluorescence experiments on the reaction of H(/sup 2/S) with O/sub 2/
A method has been developed to study the dynamics of reactions with substantial threshold energies by combining hot atom production by laser photolysis and fast product detection by laser induced fluorescence. The nascent OH rotational, vibrational, and fine structure state distributions produced in the endothermic reaction H+O/sub 2/..-->..OH(K,v, f )+O have been measured with hot hydrogen atoms from the photodissociation of HBr at 193 nm. OH rotational excitation is high and corresponds to the phase space statistical distribution over the measured range of rotational states. Also OH vibrational excitation is substantial. The OH spin doublets are produced statistically, but the partitioning in the lambda doublets is very nonstatistical with a strong preference for the ..pi../sup +/ component demonstrating the reaction to occur essentially in a plane at high collision energies. By measuring reactant and product densities at short times, an absolute total cross section of 0.42 +- /sup 0.4//sub 0.2/ (A/sup 2/) has been obtained.
- Research Organization:
- Max-Planck-Institut fuer Stroemungsforschung, 3400 Goettingen, Boettingerstrasse 6-8, West Germany
- OSTI ID:
- 5151949
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 80:4; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COMBUSTION
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FINE STRUCTURE
HOT ATOM CHEMISTRY
HYDROGEN
HYDROXYL RADICALS
KINETICS
LASER SPECTROSCOPY
NONMETALS
OXIDATION
OXYGEN
RADICALS
RADIOCHEMISTRY
REACTION KINETICS
ROTATIONAL STATES
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
VIBRATIONAL STATES