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.
|Number of pages||5|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 1 Dec 1999|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics