Polarisation effect of laser field in inelastic electron - hydrogen collisions |
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Authors: | M Bouzidi A Makhoute MN Hounkonnou |
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Institution: | UFR de Physique Atomique, Moléculaire et Optique Appliquée, Université My Isma?l, Faculté des Sciences, Meknès, Maroc, MA Institut de Mathématiques et Sciences Physiques, Université Nationale du Bénin, B.P. 613, Porto-Novo, Bénin, BJ
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Abstract: | We study the influence of the laser polarization on the electron impact excitation of atomic hydrogen. Our method takes into
account the “dressing” of the target states by including the laser-atom interaction to first order time-dependent perturbation
theory, while the interaction of the laser field with the incident electron is treated to all orders by using the non relativist
Volkov function. The interaction of the fast projectile with the target atom is treated in the first Born approximation. The
calculations are performed via two distinct computations. The first one is based on a direct calculation, the second based on a Sturmian approach. Important
differences appear between the angular distributions depending on the polarization chosen.
Received : 17 february 1998 / Revised : 20 july 1998 / Accepted : 2 september 1998 |
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Keywords: | PACS 32 80 -t Photon interactions with atoms - 34 50 Rk Laser-modified scattering and reactions - 34 80 Dp Atomic excitation and ionization by electron impact |
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