Electron capture and excitation in proton-[Formula Presented] collisions at low velocities

M. F. Politis, P. A. Hervieux, J. Hanssen, M. E. Madjet, F. Martín

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36 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)367-376
Number of pages10
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
Publication statusPublished - 1 Jan 1998

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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