Slow multiply charged ion-molecule collision dynamics studied through a multi-coincidence technique

We have studied collision dynamics and reaction processes of Kr8++N-2 system below 200 eV/u by means of a multi-coincidence technique. Reaction channels in the single-, double- and triple-charge changing collisions have been fully resolved and their related electronic states have been revealed using the measured Q-value spectra and kinetic energy release distributions. In the low energy collisions, "anisotropic fragmentation" was found for asymmetrically charged fragmentation channels. This anisotropy is enhanced by decreasing the collision energy and increasing the charge asymmetry. The "anisotropic fragmentation" should be caused from rotation of the molecular axis induced by polarization effect and post collision interaction.