2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86431The independent atom and electron model [1] is introduced in a quantum context and associated approximations tentatively estimated. Confrontation of the model to measured ionization and excitation cross sections of small ionic carbon clusters Cn+ in collisions with helium at an impact velocity of 2.6 a.u is presented.Atomic and Molecular Clusterstext