Coupled channels in the distorted-wave representation

Journal Article · Mon May 15 00:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.4998· OSTI ID:6320730

Bray, I; McCarthy, I E; Mitroy, J; Ratnavelu, K

The scattering of electrons or positrons to discrete states of an atomic target is represented in momentum space by coupled integral equations. By introducing a local central potential one may set up a distorted-wave representation for the integral equations, which can be solved to arbitrary numerical accuracy by quadratures. The perturbative solutions of these equations are the commonly used distorted-wave first- and second-order Born approximations. The full coupled on-shell solution is the distorted-wave unitarized Born approximation. These approximations are tested for charged and uncharged targets. The formalism for inclusion of configuration interaction in the target is described, making a complete theory for electron-atom scattering in a truncated channel space, which can be extended by optical potentials to a fully realistic situation.

• Research Organization: Institute for Atomic Studies, The Flinders University of South Australia, Bedford Park, South Australia 5042, Australia
• OSTI ID: 6320730
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:10; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
BORN APPROXIMATION
CENTRAL POTENTIAL
CHARGED PARTICLES
COLLISIONS
CONFIGURATION INTERACTION
COUPLED CHANNEL BORN APPROXIMATION
DWBA
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRON-ION COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
EXCITATION
HARTREE-FOCK METHOD
HELIUM IONS
INTEGRAL EQUATIONS
ION COLLISIONS
IONS
LIPPMANN-SCHWINGER EQUATION
MANY-BODY PROBLEM
METALS
POTENTIALS
SODIUM