Cluster-size dependence of electron capture and excitation cross sections in proton-Nan collisions

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

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Abstract

We have evaluated electron capture and excitation cross sections for H+ + Nan collisions (n = 8,20,40,92) in the impact energy range 40-500 eV. The theoretical method includes the many-electron aspect of the problem and makes use of realistic cluster potentials obtained with density-functional theory and a spherical jellium model. Both electron capture and excitation cross sections increase monotonically with cluster size, but the rate of this increase is much more pronounced than expected from purely geometrical considerations. Also, capture cross sections are between one and two orders of magnitude larger than the geometrical cross sections. For the larger systems, our results differ from recent theoretical estimates obtained at higher impact energies.

Original languageEnglish
Pages (from-to)4701-4705
Number of pages5
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume60
Issue number6
Publication statusPublished - 1 Dec 1999
Externally publishedYes

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ASJC Scopus subject areas

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

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