In contrast to the first Born approximation predicted quadratic enhancement, saturation has been observed in the excitation cross-sections of 120 MeV S14+ ions in interaction with gas targets. The measured cross-sections agree with the theoretical calculations in the framework of the Schwinger variational principle. The symmetric eikonal CDW approximation, however, underestimates the cross-sections with the heavier target atoms.
|Number of pages||3|
|Journal||Physica Scripta T|
|Publication status||Published - Dec 1 1999|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Mathematical Physics
- Condensed Matter Physics