Interaction of fast multiply charged ions with solid and gaseous media

On the basis of experimentally measured charge distributions $F_i$ in the ion beam after traversing a gaseous (nitrogen) target and thin celluloid films differing in thickness, the charge-exchange cross sections of fast ions are calculated. The results of calculating and measuring the charge distributions at the ion velocities $V=3.6$ and $5.5$ amu as a function of the target thickness t are presented. The dependence of the equilibrium charge $i_{\rm eq}$ and the equilibrium target thickness $t_{\rm eq}$ both on the velocity and initial charge state of the incident ions, on the one hand, and the thickness and state of aggregation of the target, on the other, are analyzed.