Elastic scattering of fast electrons and positrons by atoms

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.43.578· OSTI ID:6045754

Salvat, F ^[1]

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1. Facultat de Fisica (ECM), Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Spain (ES)

Elastic scattering of relativistic electrons and positrons by atoms is considered in the framework of the static field approximation. The scattering field is expressed as a sum of Yukawa terms to allow the use of various approximations. Accurate phase shifts have been computed by combining Buehring's power-series method with the WKB and Born approximations. This combined procedure allows the evaluation of differential cross sections for kinetic energies up to several tens of MeV. Numerical results are used to analyze the validity of several approximate methods, namely the first- and second-order Born approximations and the screened Mott formula, which are frequently adopted as the basis of multiple scattering theories and Monte Carlo simulations of electron and positron transport.

• OSTI ID: 6045754
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 43:1; ISSN PLRAA; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ENERGY RANGE
MEV RANGE
MEV RANGE 10-100
NUCLEAR POTENTIAL
PHASE SHIFT
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
POTENTIALS
SCATTERING
YUKAWA POTENTIAL