Model potential treatment of C4++ H2collisions at low impact energies

This is the authors' abstract. We don't add key points for this paper.

We present cross sections for electron capture in C 4+ + H 2 collisions in the energy range 50 eV amu -1 ⩽ E ⩽ 6 keV amu -1 , calculated using a model potential aproximation to treat the interaction of the active electron with C 4+ and H 2 + cores and an equivalent-electron bielectronic interpretation of the probabilities. The limitations of this method are analysed by comparison with the two-electron ab initio treatment. Double-electron-capture cross sections are also calculated using ab initio and model potential treatments. We propose a modified independent particle model to evaluate single-electron-capture cross sections.