Electron capture and excitation in proton-Na20 collisions at low velocities

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

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We present a many-electron theoretical study of electron capture and excitation in collisions of H+ with Na20 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 ∼ (2-5) × 1014 cm2 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
Volume58
Issue number1
Publication statusPublished - 1 Dec 1998
Externally publishedYes

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electron capture
low speed
collisions
protons
excitation
absorption cross sections
energy
fragmentation
electrons
formalism
cross sections
approximation
atoms
ions
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Electron capture and excitation in proton-Na20 collisions at low velocities. / Politis, M. F.; Hervieux, P. A.; Hanssen, J.; Madjet, Mohamed; Martín, F.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 58, No. 1, 01.12.1998, p. 367-376.

Research output: Contribution to journalArticle

Politis, M. F. ; Hervieux, P. A. ; Hanssen, J. ; Madjet, Mohamed ; Martín, F. / Electron capture and excitation in proton-Na20 collisions at low velocities. In: Physical Review A - Atomic, Molecular, and Optical Physics. 1998 ; Vol. 58, No. 1. pp. 367-376.
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