Study of electron-molecule collisions via the finite-element method and [ital R]-matrix propagation technique: Model exchange

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.360· OSTI ID:7233029

Abdolsalami, F ^[1]; Abdolsalami, M; Gomez, P ^[2]

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1. Department of Engineering Science, Trinity University, San Antonio, Texas 78212 (United States)
2. Engineering Department, St. Mary's University, San Antonio, Texas 78228 (United States)

We have applied the finite-element method to electron-molecule collisions. All the calculations are done in the body frame within the fixed-nuclei approximation. A model potential, which is added to the static and polarization potential, has been used to represent the exchange effect. The method is applied to electron-H[sub 2] scattering and the eigenphase sums and the cross sections obtained are in very good agreement with the corresponding results from the linear-algebraic approach. Finite-element calculations of the [ital R] matrix in the region where the static and exchange interactions are strong, however, has about one-half to one-fourth of the memory requirement of the linear-algebraic technique.

• OSTI ID: 7233029
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CALCULATION METHODS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
EXCHANGE INTERACTIONS
FINITE ELEMENT METHOD
HYDROGEN
INTERACTIONS
MATRICES
MOLECULE COLLISIONS
NONMETALS
NUMERICAL SOLUTION
POTENTIALS
R MATRIX