Laser magnetic resonance, resonance fluorescence, and resonance absorption studies of the reaction kinetics of O + OH. -->. H + O/sub 2/, O + HO/sub 2/. -->. OH + O/sub 2/, N + OH. -->. H + NO, and N + HO/sub 2/. -->. products at 300 K between 1 and 5 torr

Journal Article · Thu Oct 27 04:00:00 EDT 1983 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100245a034· OSTI ID:6855676

Brune, W H; Schwab, J J; Anderson, J G

A new tandem axis, laser magnetic resonance-resonance fluorescence-resonance absorption, fast flow system is used to examine the kinetics of four reactions in the oxygen-nitrogen-hydrogen free radical system. The experimental approach emphasizes simultaneous detection of reactants and products, cross calibration of detection axes, multiple sources for free-radical-formation steps, and computer simulation of the time dependence of reactants and products through the course of each reaction. Rate constants are reported as follows: OH + O ..-->.. H + O/sub 2/, (3.1 +/- 0.5) X 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/; HO/sub 2/ + O ..-->.. OH + O/sub 2/, (5.2 +/- 0.8) X 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/; OH + N ..-->.. H + NO, (4.2 +/- 0.8) X 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/; HO/sub 2/ + N ..-->.. products, (2.2 +/- 0.5) X 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/. Cited uncertainties are 95% confidence limits and include consideration of possible systematic errors. All experiments were done in helium or argon at 300 K and pressures between 1 and 5 torr. 10 figures, 7 tables.

• Research Organization: Harvard Univ., Cambridge, MA
• OSTI ID: 6855676
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 87:22; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400600* -- Radiation Chemistry
ABSORPTION
ATOMS
CALIBRATION
CARBON DIOXIDE LASERS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FLUORESCENCE
GAS LASERS
HYDROPEROXY RADICALS
HYDROXYL RADICALS
INFORMATION
INFRARED RADIATION
IONIZATION
KINETICS
LASER RADIATION
LASERS
LOW PRESSURE
LUMINESCENCE
MEDIUM TEMPERATURE
NONMETALS
NUMERICAL DATA
OPERATION
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PRESSURE DEPENDENCE
RADIATIONS
RADICALS
REACTION KINETICS
RESONANCE
RESONANCE FLUORESCENCE
SIMULATION
TEMPERATURE DEPENDENCE
TIME DEPENDENCE