Makhoute, A. and Agueny, H. and Dubois, A. and Ajana, I. and Taoutioui, A. (2016) Electron-impact elastic scattering of helium in the presence of a laser field: Non perturbative approach. Journal of Physics B: Atomic, Molecular and Optical Physics, 49 (7).

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We report a detailed analysis of electron-helium scattering in the presence of a laser field; focusing on the elastic process of helium atoms from the ground state 11 S. The process under investigation is dealt with a nonperturbative approach using the Volkov wave function to describe the incident and scattered electrons, while the laser-target interaction is treated by using the Floquet method. The interaction of the incident electron with the atomic target is treated within the first Born approximation. Our results are perfectly consistent with the experimental data of DeHarak et al and with the Kroll-Watson approximation results for both one and two photon emission. We have investigated the effect of nonresonant and near resonant laser field on the electron-helium elastic collision process. It was found that the differential cross section is sensitive to the intensity and the frequency of the laser field. In the case of a non resonant laser field, dressing effects are important at small scattering angles. For a near-resonant laser photon energy, those effects are strongly reduced in the forward direction. © 2016 IOP Publishing Ltd.

Item Type: Article
Uncontrolled Keywords: Atom lasers; Electrons; Ground state; Helium; Photons; Wave functions, Differential cross section; Elastic collision process; Elastic process; First Born approximation; Floquet method; Laser fields; Laser-target interaction; Nonperturbative, Elastic scattering
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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