Reactions of velocity-aligned atoms probed by Doppler profiles: H+O[sub 2][r arrow]OH+O

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.467712· OSTI ID:7197596

Kim, H L; Wickramaaratchi, M A; Zheng, X; Hall, G E ^[1]

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1. Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Final state resolved vector properties of the reaction H ([sup 2][ital S])+O[sub 2]([sup 3][Sigma][sup [minus]][sub [ital g]])[r arrow]OH([sup 2][Pi])+O([sup 3][ital P]) have been measured using Doppler spectroscopy. Velocity-aligned H atoms were generated by photodissociation of H[sub 2]S with linearly polarized ArF excimer laser light. The correlated velocity and angular momentum distribution of nascent OH reaction products was probed by laser induced fluorescence. Techniques are described for analyzing the line shapes, modeling the bipolar moments of the OH velocity and angular momentum distribution as parametric functions of the scattering angle. Distinctive Doppler-broadened lineshapes indicate scattering angle distributions with a strong forward and a weaker backward maximum. A qualitatively different angular momentum polarization for the two lambda doublet components of the OH product is required to explain the Doppler profiles.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7197596
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 101:3; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALIGNMENT
ANGULAR MOMENTUM
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
ATOMS
CHEMICAL REACTIONS
COLLISIONS
DOPPLER EFFECT
ELEMENTS
ENERGY LEVELS
FLUORESCENCE
HYDROGEN
HYDROXYL RADICALS
LASER SPECTROSCOPY
LUMINESCENCE
MOLECULE COLLISIONS
NONMETALS
OXYGEN
P STATES
RADICALS
S STATES
SPECTROSCOPY
TENSORS
VECTORS
VELOCITY
YIELDS