Dissociative attachment of electrons to vibrationally excited H sub 2

Calculations are reported of the dissociative attachment of low-energy (less than 5 eV) electrons to molecular hydrogen in the states {ital v}=0--9 and {ital J}=0. The dynamics are treated using resonant scattering theory, fully including the nonlocal and energy-dependent shift and width operators....

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1991-04, Vol.43:7
Main Author: Hickman, A.P.
Format: Article
Language:English
Subjects:
640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena
ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
COMPARATIVE EVALUATIONS
DISSOCIATION
ELECTRON ATTACHMENT
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EXCITED STATES
GROUND STATES
HYDROGEN
MOLECULE COLLISIONS
NONMETALS
RESONANCE
VIBRATIONAL STATES
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Summary:Calculations are reported of the dissociative attachment of low-energy (less than 5 eV) electrons to molecular hydrogen in the states {ital v}=0--9 and {ital J}=0. The dynamics are treated using resonant scattering theory, fully including the nonlocal and energy-dependent shift and width operators. The necessary coupling terms are taken from the {ital ab} {ital initio} calculations of fixed-{ital R} electron-H{sub 2} scattering performed by Muendel, Berman, and Domcke (Phys. Rev. A 32, 181 (1985)). Good agreement with the available experimental data of Schulz and Asundi (Phys. Rev. 158, 2 (1967)) and of Allan and Wong (Phys. Rev. Lett. 41, 1791 (1978)) is achieved. Exploratory calculations were performed to investigate various local approximations to the nonlocal shift operator. The results suggest that the optimum local approximation will, in general, differ from the curve obtained in a fixed-nuclei structure calculation.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.43.3495