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Bonn 2000 – wissenschaftliches Programm

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A: Atomphysik

A 4: Atom–/Ionenstöße II

A 4.7: Vortrag

Montag, 3. April 2000, 18:00–18:15, HS II

On the projectile-electron loss in fast collisions with heavy atomic targets — •A.B. Voitkiv, N. Grün und W. Scheid — Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen

The projectile-electron excitation and loss processes are considered in collisions with heavy atomic targets in the intermediate-to-high velocity regime. In order to describe these processes at small impact parameters, where first order theories in the projectile-target interaction break down, we use the sudden and Glauber approximations. We show that these approximations lead to the same results for electronic cross sections. The main focus of our study is the total contribution of the target to the projectile-electron loss process. We have estimated the cross section for the total electron loss from H and He+ projectiles. Our results show that the interaction of the projectile electron with the screened target nucleus contributes most to the projectile-electron loss cross section in the intermediate-to-high velocity regime.

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