Effect of charge exchange of $^{14}$N and $^{16}$O ions with 30-330 kev/nucleon energies on their multiple scattering in metal films

The differential and integral angular distributions of the $^{14}$N and $^{16}$О ions with initial energies $\varepsilon_0\approx{}$32, 78, 110, and 330 keV/nucleon scattered in Al, Cu, Ag, and Au films from ~ 0.3 to 2.3 fim in thickness have been measured. Universal relationships between the half-widths of these distributions and the target thickness are obtained. Based on the analysis of the angular distributions of the particles scattered in the thinnest films, the magnitude and the energy dependence of the "effective charge" $i_{\rm sc}$, whose introduction into the Moliere—Bethe theory [2—4] makes it possible to take account of the effect of ion charge exchange in the course of scattering, are found.