Multi electron capture processes in slow collisions between X7+ (X = N, O and Ne) ions with C60

Abstract

Electron capture processes in collision between slow X7+ (X = N, O and Ne) ions and C60 fullerene have been investigated using coincident measurements of the number n of ejected electrons, the mass and charge of the multicharged C60r+ recoil ions and their fragments Cmi+ and the final charge state of the outgoing projectiles X(q-s)+ (\(1 \leqslant s \leqslant q-1\)). The collision velocity is about 0.4 a.u. The partial cross-sections σrs , corresponding to r electrons transferred to the projectile with only s electrons stabilized, have been measured. Cross-sections for collisions “inside” and those “outside” the C60 cage have been separated by analyzing the kinetic energy of the outgoing projectile. The mean final charge state for frontal collisions has been measured to 3.1, 2.6 and 2.5 for N7+, O7+ and Ne7+ respectively. These results show the importance of the core effect on the stabilisation processes of captured electrons.