Schwinger variational principle applied to long-range potentials

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.29.1857· OSTI ID:6813817

Smith, M E; Lucchese, R R; McKoy, V

We discuss an adaptation of the Schwinger variational principle which is particularly suitable for dealing with long-range potentials. The method treats the direct interaction potential exactly by numerical integration and assumes a separable representation of the Schwinger type for the exchange potential. The method should be very effective for obtaining the electronic continuum solutions of strongly polar molecular ions. The related photoionization cross sections can be shown to be variationally stable.

• Research Organization: Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125
• OSTI ID: 6813817
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 29:4; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLES
COLLISIONS
DISTANCE
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
EQUATIONS
EXCHANGE INTERACTIONS
FUNCTIONS
GREEN FUNCTION
INTEGRAL EQUATIONS
INTERACTION RANGE
INTERACTIONS
INTERMOLECULAR FORCES
IONIZATION
IONS
ITERATIVE METHODS
LIPPMANN-SCHWINGER EQUATION
MOLECULAR IONS
MOLECULE COLLISIONS
PHOTOIONIZATION
POLAR COMPOUNDS
POTENTIALS
SCHWINGER VARIATIONAL METHOD
VARIATIONAL METHODS