Classical differential cross sections for anisotropic potentials

摘要

Classical differential cross sections for a model ionndash;molecule system are calculated using a recently developed, classical scattering formalism. The deflection angle is computed using classical perturbation scattering theory (CPST). The scattering in the rainbow region is examined in detail; in several cases a second classical rainbow is observed. No rainbow scattering is observed for an ion colliding with a molecule with a moderate dipole moment, but a rainbow pattern is seen with molecules with moderate quadrupole moments. This agrees with the available experimental results. Finally, the topology of classical scattering in the rainbow region is discussed.