Moment T-matrix approach to e/sup +/-H scattering. I. Angular distribution and total cross section for energies below the pickup threshold

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.18.910· OSTI ID:6682287

Winick, J R; Reinhardt, W P

A formalism is developed for calculation of electron and positron scattering from atoms at low and intermediate energies in terms of appropriate matrix elements of the off-shell T operator. The technique is based on an L/sup 2/ discretization of the full electronic Hamiltonian, initially avoiding all specification of channels and asymptotic boundary conditions. Scattering information relating to specific initial and final channels is obtained by taking appropriate off-shell matrix elements, followed by construction of the total real axis discontinuity of the off-shell elements via moment techniques. The formalism is applied to the problem of purely elastic e/sup +/-H scattering, resulting in converged total cross sections and angular distributions below the pickup threshold.

• Research Organization: Department of Chemistry, University of Colorado, and Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309
• OSTI ID: 6682287
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DISTRIBUTION
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
FLUIDS
HYDROGEN
MATRICES
NONMETALS
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
S MATRIX
SCATTERING
TOTAL CROSS SECTIONS