Electron-capture dynamics in collisions of Si-4 ions with He atoms at intermediate energies - art. no. 042717

Citation
R. Suzuki et al., Electron-capture dynamics in collisions of Si-4 ions with He atoms at intermediate energies - art. no. 042717, PHYS REV A, 6304(4), 2001, pp. 2717
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
1050-2947 → ACNP
Volume
6304
Issue
4
Year of publication
2001
Database
ISI
SICI code
1050-2947(200104)6304:4<2717:EDICOS>2.0.ZU;2-#
Abstract
Electron capture resulting from collisions of Si4+ ions with He atoms below 25 keV/u is investigated using a molecular-orbital representation within b oth the semiclassical and quantal representations. Nine molecular states co nnectings both to single and double electron-capture processes are included , and hence radial and rotational couplings among these channels are fully considered. Electronic stares and corresponding couplings are determined by the multireference single- and double-excitation configuration interaction method. The present results tie in well with the earlier calculations of S tancil et al. at lower energies, but show a rather different magnitude from the theoretical results of Bacchus-Montabonel and Ceyzeriat and are somewh at smaller than the measurements of Tawara et al. The present rate constant s do not support the experimental finding of Fang and Kwong at 4,600 K.