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Reactive resonances and angular distributions in the rotating linear model

Journal Article · · ACS Symp. Ser.; (United States)
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The authors use the Bending-Corrected Rotating Linear Model (BCRLM) to investigate in detail the way in which resonances may affect the angular distribution of reaction products. Using a lifetime matrix method, they separate the resonant and direct parts of the S matrix, and from the direct part they obtain angular distributions in the absence of the resonance. When applied to the F+H2(v=0) HF(v'=2)+H reaction on the M5 surface, at an energy for which the angular distribution is strongly sideways peaked, the authors find the resonance enhances the intensity of the sideways scattering, and shifts the sideways peak toward the forward direction. They also describe conditions for which angular distributions have a significant forward scattering component at the reaction threshold. For the F+H2(v=0) HF(v'=2)+H reaction on an improved potential surface, there is forward scattering at threshold because a resonance builds in at large partial waves. For the He+H2 (v=3) HeH (v'=0)+H reaction, there are many overlapping resonances in all partial waves, and the reaction proceeds without a barrier. Reactivity from many partial waves at the reaction threshold results in significant forward scattering.
Research Organization:
National Science Foundation, Washington, DC
OSTI ID:
6270090
Journal Information:
ACS Symp. Ser.; (United States), Journal Name: ACS Symp. Ser.; (United States) Vol. 263; ISSN ACSMC
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CORRELATIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTS
FLUIDS
FLUORINE
GASES
HALOGENS
HELIUM
HYDROGEN
INELASTIC SCATTERING
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MATRICES
MOLECULE COLLISIONS
NONMETALS
NUMERICAL DATA
PARTIAL WAVES
RARE GASES
RESONANCE SCATTERING
S MATRIX
SCATTERING
THEORETICAL DATA