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A semi-relativistic eikonal distorted wave model for collisions of fast highly charged ions with light atomic targets

par Selin, A.V. A.V.;Ermolaev, Alexei ;Joachain, Charles
Référence Journal of Physics. B, Atomic Molecular and Optical Physics, 36, 19, page (L303-L309)
Publication Publié, 2003-10

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Résumé :

We propose a semi-relativistic symmetric eikonal distorted wave method for treating collisions of fast projectiles with light atomic targets. The projectile interaction with target electrons is described by the Liénard-Wiechert potential, within the impact parameter approach. Our model allows one to estimate two-centre effects in fast heavy-particle collisions. It is found that in the dipole approximation the first-order eikonal cross sections differ from the corresponding Born cross sections by a simple factor that accounts for the forward-backward asymmetry of the ejected electron with respect to the direction of the projectile motion. As an illustration of our method we have carried out calculations for single ionization in collisions of fast U 92+ ions (1 GeV u -1) with helium targets.