The role of multiple-scattering events has been investigated in single ionization of atoms induced by energetic ion impact. The triply differential cross sections have been evaluated as a function of the projectile scattering angle for fixed values of the emitted electron energy and angle within the framework of the distorted-wave Born approximation (DWB). It has been shown that the double-scattering mechanism, which (sometimes) results in a characteristic double-scattering peak at a definite projectile scattering angle, provides a satisfactory description of the process over a wide region of electron ejection energies and angles. For low-energy electron emission the role of higher orders is not negligible, and the quantum mechanical nature of the process is more emphasized. At an electron velocity equal to the projectile velocity the analogy with the mechanism of electron capture into bound states has also been investigated. In this region the DWB theory for ionization corresponds to the Oppenheimer-Brinkman-Kramers model for electron capture.
|Number of pages||11|
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Publication status||Published - Apr 28 2001|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics