https://doi.org/10.1007/s100530170268
Interpretation of the structures observed for excitation cross-sections in C2+/He2+-Li collisions
1
Laboratoire de Chimie Physique-Matière et
Rayonnement (Unité mixte de recherches du CNRS, UMR 7614.) ,
Université Pierre et Marie Curie,
11 rue Pierre et Marie Curie,
75231 Paris Cedex 05, France
2
Institute of Physics, University of Bergen, Allégaten 55,
5007 Bergen, Norway
Corresponding author: a ad@ccr.jussieu.fr
Received:
7
July
2000
Published online: 15 February 2001
The existence of oscillatory or plateau like
structures in the low energy dependence of the excitation
cross-sections in ion-atom collisions has recently been subject of
different interpretations based on model calculations.
We report atomic-state close-coupling calculations for the description of
Li
excitation by
He2+ and C2+ impact where the appearance of such structures
is very different and previously documented in experimental studies.
A system specific interpretation based on
dynamic
adiabatic energy curves is given and the
interplay between high-energy direct and low-energy molecular
mechanisms in the two systems are discussed.
PACS: 34.10.+x – General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.) / 34.50.Fa – Electronic excitation and ionization of atoms (including beam-foil excitation and ionization) / 34.50.Pi – State-to-state scattering analyses
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
