Lateral multiple scattering of energetic ions in very thin targets:Z1oscillations

Abstract
We report measurements of lateral multiple scattering of 15-60-keV ions with atomic number from 6 to 82 on xenon targets of reduced thickness 0.01<τ<0.17. Significant deviations from the scaling properties inherent in current multiple-scattering theory are observed. The widths of the multiple-scattering distributions are not strictly proportional to the reciprocal ion energy, and they oscillate heavily with ion atomic number. These oscillations are similar to those found in electronic stopping power.