Quasifree-scattering model for the imaginary part of the optical potential for electron scattering

Grayna Staszewska, David W. Schwenke, Devarajan Thirumalai, Donald G Truhlar

Research output: Contribution to journalArticle

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Abstract

A relatively simple nonempirical formula for the imaginary part of the optical potential for electron scattering is derived from a quasifree-scattering model with Pauli blocking in which the target is treated as a free-electron gas. The resulting absorption potential is local and energy dependent and is a function of the electron density of the target. This model is tested for electron-helium and electron-neon scattering at 30-3000 eV. For these tests the real part of the potential is also approximated by a local expression, which is partitioned into static, exchange, and polarization terms. Reasonably good agreement with experimental data is obtained for the elastic integral, absorption, and elastic differential cross sections.

Original languageEnglish (US)
Pages (from-to)2740-2751
Number of pages12
JournalPhysical Review A
Volume28
Issue number5
DOIs
StatePublished - Jan 1 1983

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