Energy loss of heavy ions in nuclear collisions in silicon

Heavy-ion channeling measurements performed in aligned surface-barrier detectors have allowed the determination of energy losses and straggling in nuclear collisions. Results are presented for ²⁸Si⁺ and ¹⁴N⁺ in the 300-2000-keV region to illustrate the possibilities of this method. Comparisons of the theoretical and experimental data are made. A dependence of the energy partition between electronic and nuclear collisions on the atomic density along the ion path is demonstrated.