Capture and ionization cross sections in 10 MeV C5+ cluster-helium collisions
Résumé
Capture, single, double and triple ionization cross sections of 10 MeV C5+ clusters colliding with He atoms have been measured. This was achieved thanks to a new experimental set-up allowing for a complete collection and unambiguous identification of all the fragments emitted by the dissociative C5Q+ species (Q = 0 → 4). We use these results, together with similar cross sections obtained with identical velocity atomic projectiles (2 MeV C+ → He system), for testing a cluster-atom collision model based on a representation of the clusters in terms of independent atoms. Ionization is qualitatively and quantitatively accounted for by the model, but capture not.