INDEPENDENT PARTICLE MODEL DESCRIPTION OF MULTIPLE IONIZATION DYNAMICS IN FAST ION ATOM COLLISIONS

The time-dependent dynamics of the many-electron density and its interaction with projectile and target nuclei is described within the semiclassical (HBAR = 0) Vlasov model. Differential cross sections for multiple ionization as a function of projectile scattering angle and transverse target recoil momentum are calculated. Average scattering angles are obtained as a function of impact parameter within the model taking into account a given number of ejected electrons for each recoil ion charge state. Other results include projectile energy loss and the relationship between projectile and target nuclear motion. Comparison with experiment and classical N-particle simulations (N-CTMC) is made for two systems, namely, C6+-Ne, and U33+-Ne at collision energies of 0.8 and 1.4 MeV amu-1 respectively.