Projectile Residual-Target-Ion Scattering after Single Ionization of Helium by Slow Proton Impact
Abstract
We have measured fully differential single ionization cross sections for 75 keV p+He collisions. At this relatively small projectile velocity, signatures of the projectile residual-target-ion interaction, which are not observable for fast projectiles and for electron impact, are revealed rather sensitively. In fact, this interaction appears to be more important than the postcollision interaction, which so far was assumed to be the most important factor in higher-order effects for slow ion impact. These features are not well reproduced by our three-distorted-wave calculations.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2005
- DOI:
- Bibcode:
- 2005PhRvL..94x3201M
- Keywords:
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- 34.50.Fa;
- 34.10.+x;
- 34.50.Bw;
- Electronic excitation and ionization of atoms;
- General theories and models of atomic and molecular collisions and interactions;
- Energy loss and stopping power