Elastic scattering of fast electrons and positrons by atoms

Francesc Salvat
Phys. Rev. A 43, 578 – Published 1 January 1991
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Abstract

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 Bühring’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.

  • Received 23 July 1990

DOI:https://doi.org/10.1103/PhysRevA.43.578

©1991 American Physical Society

Authors & Affiliations

Francesc Salvat

  • Facultat de Física (ECM), Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Spain

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Vol. 43, Iss. 1 — January 1991

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