Energy loss of heavy ions at nonzero emergence angles

Abstract

Energy-angle distributions have been measured and theoretically investigated for 0.8 v 0 20Ne ions penetrating thin amorphous carbon targets. A Monte Carlo method has been used to model the impact parameter dependence of the stopping with a modified Oen-Robinson description. The elastic interaction has been treated via the ZBL interatomic potential. We find that the specific energy loss may increase or decrease with increasing target thickness in a fashion that depends markedly on the emergence angle of the transmitted particles. The model calculations are in good agreement with experimentally measured energy loss distributions.