We report fully differential cross sections (FDCS) for the single ionization of helium by a 75 keV incident energy proton. Previous three-body distorted wave (3DW) calculations for this collision system are in poor agreement with the absolute magnitude of the experimental measurements. The 3DW approximation treats the four-body problem as an effective three-body problem in which the passive electron does not participate in the collision. We have developed a full four-body approach in which the passive electron fully participates in the collision. It will be shown that the FDCS is very sensitive to the treatment of the passive electron-ejected electron interaction. Results of our full four-body approach will be compared with recent absolute experimental measurements.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Dec 2005|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics