Ajana, I. and Makhoute, A. and Khalil, D. and Chaddou, S. (2015) Exchange effects and second-order Born corrections in laser-assisted (e, 2e) collisions with helium atoms. Physical Review A - Atomic, Molecular, and Optical Physics, 91 (4).

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Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

The triple differential cross section for laser-assisted ionization of a helium target by slow electrons is analyzed within the framework of the second Born approximation. We evaluate the S-matrix elements using Volkov and Coulomb-Volkov wave functions for describing the continuum states of the scattered and the ejected electrons, respectively. The required scattering amplitudes are performed by expanding the atomic wave functions onto a complex-scaled Sturmian basis, which allows us to exactly take into account the contribution of the continuous spectrum to the dressing of the atomic states. Our results have been improved by taking into account exchange effects. Furthermore, the second-order Born correction is seen to be important and significantly affects the magnitudes of the binary and recoil peaks. © 2015 American Physical Society.

Item Type: Article
Uncontrolled Keywords: Atoms; Electron-electron interactions; Helium; Scattering parameters; Wave functions, Atomic wave function; Continuous spectrum; Coulomb-Volkov wave function; Ejected electrons; S-matrix elements; Scattering amplitudes; Second Born approximation; Triple differential cross sections, Atom lasers
Subjects: Physics and Astronomy
Divisions: SCIENTIFIC PRODUCTION > Physics and Astronomy
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:49
URI: http://eprints.umi.ac.ma/id/eprint/4480

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