Separable approximation for exchange interactions in electron-molecule scattering

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.24.1267· OSTI ID:5932674

Rescigno, T N; Orel, A E

We have formulated and applied a separable approximation for treating the nonlocal exchange interactions that arise in electron-molecule collision problems. A separable representation of the exchange terms in the electron-molecule interaction potential is obtained by projection onto a finite set of Cartesian Gaussian functions and is combined with a single-center expansion of the direct potential terms that accurately treats the long-range, multipolar forces. An integral-equation method is used to obtain a solution of the set of coupled equations obtained in a body-frame formulation of the collision problem. The method is illustrated by application to low-energy e/sup -/-H/sub 2/ and e/sup -/-LiH scattering in the static-exchange approximation.

• Research Organization: Theoretical Atomic and Molecular Physics Group, Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5932674
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 24:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
COLLISIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
EXCHANGE INTERACTIONS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INTERACTIONS
LITHIUM COMPOUNDS
LITHIUM HYDRIDES
MOLECULE COLLISIONS
NONMETALS