Angular distributions of projectiles following electron capture from ${\mathrm{C}}_{60}$ by 2.5-keV ${\mathrm{Ar}}^{8+}$

Experimental measurements of the projectile angular distributions for 2.5-keV ${\mathrm{Ar}}^{8+}$ ions capturing one to five electrons from a gas-phase ${\mathrm{C}}_{60}$ target are presented. The number of captured electrons was determined by demanding a coincidence between the scattered projectile and a charge-state-analyzed intact ${\mathrm{C}}_{60}$ recoil ion. The results are compared to calculations based on a dynamical classical overbarrier model. Good agreement is obtained only if the influence on the projectile trajectory by the large polarizability of the ${\mathrm{C}}_{60}$ target is taken into account, thereby making the collective dielectric response of the cluster target observable in a scattering experiment.