We present a many-electron theoretical study of electron capture and excitation in collisions of [Formula Presented] with [Formula Presented] clusters for impact energies 40–500 eV. The collision is treated semiclassically using the independent-electron model, and the cluster is described in the framework of the Kohn-Sham formalism with a local-density approximation which includes exchange, correlation, and a self-interaction correction. We have found that capture cross sections are [Formula Presented] and dominate in the above energy range. In contrast with ion-atom collisions, excitation cross sections are comparable to the former, and multiple processes such as capture excitation cannot be neglected at low velocities. From the analysis of the vacancies originated in the collision, we have evaluated the energy deposited in the cluster, which is an essential parameter in the study of cluster fragmentation.
|Number of pages||10|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 1 Jan 1998|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics