Negative ions as a probe to study the fragmentation of clusters and small molecular targets as a function of the excitation energy

The production rate of negative ions in collisions between neutral, singly and multiply charged ions with clusters or small molecules is a crucial parameter to study the fragmentation of the targets as a function of the excitation energy (CIDEC method). We report on high production yields of negative ions in collisions between F''q''+(q = 1-3) ions and fullerene C60 and adenine molecules. The dynamics of the formation of the negative ion in such collisions is discussed.