https://doi.org/10.1140/epjd/e2006-00249-1
The second Born approximation in electron-helium scattering in a Nd-YAG laser field
1
UFR de Physique Atomique, Moléculaire et Optique Appliquée, Faculté des Sciences, Université Moulay Ismail, B.P. 11201, Meknès, Morocco
2
The Abdus Salam International Centre for Theoretical Physics, strada costiera II, 34100 Trieste, Italy
3
Laboratoire de Chimie Physique, Matière et Rayonnement, Université Pierre et Marie Curie, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
Corresponding author: a makhoute@fsmek.ac.ma
Received:
27
January
2006
Revised:
17
June
2006
Published online:
15
November
2006
The dynamics of laser-assisted elastic collisions in helium is studied using the second-order Born approximation. Detailed calculations of the scattering amplitudes are performed by using the Sturmian basis expansion. Differential cross sections for elastic scattering with the net absorption/emission of up to two photons are calculated for collision energies of 5 eV, 10 eV, and 20 eV. We discuss the influence of the low-energy electrons on the differential cross section (DCS) as a function of the scattering angle for selected choices of the laser frequency and the number of photons exchanged between the external field and electron-helium system.
PACS: 32.10.-f – Properties of atoms / 32.80.-t – Photon interactions with atoms / 32.80.Wr – Other multiphoton processes / 32.80.Cy – Atomic scattering, cross sections, and form factors; Compton scattering
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006
