Makhoute, A. and Ajana, I. and Khalil, D. (2014) Low-energy electron-impact laser-assisted ionization of atomic hydrogen. Physical Review A - Atomic, Molecular, and Optical Physics, 90 (5).

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We have studied the influence of a linearly polarized laser field on the dynamics of low (e,2e) collisions in atomic hydrogen. The influence of the laser on the target states is treated using a first-order perturbation approach. The continuum states of the scattered and ejected electrons are described respectively by Volkov and Coulomb-Volkov wave functions. The second Born approximation is used to calculate triple differential cross sections for laser-assisted ionization by low-energy electron impact. The required scattering amplitudes are evaluated by using the Sturmian basis expansion. The influence of the laser parameters (photon energy, intensity, and direction of polarization) on the triple differential cross sections is analyzed, and several illustrative examples are discussed. Our second Born approximation results agree very well with those obtained in the first-order Born approximation at larger incident energies. The margins between the second and first Born approximation results are large at low incident energies in the vicinity of the recoil peaks. © 2014 American Physical Society.

Item Type: Article
Uncontrolled Keywords: Atomic physics; Born approximation; Electron-electron interactions; Electrons; Hydrogen; Ionization; Polarization, Coulomb-Volkov wave function; First Born approximation; First-order Born approximation; Linearly polarized laser field; Perturbation approach; Scattering amplitudes; Second Born approximation; Triple differential cross sections, Impact ionization
Subjects: Physics and Astronomy
Divisions: SCIENTIFIC PRODUCTION > Physics and Astronomy
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:49

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