The effect of multiple collisions on the electronic stopping losses

Abstract

The paper considers the question of the dependence of electronic stopping dE/dx on the measurement technique. Usually, when using the transmission geometry, the value of electron stopping is defined as the ratio of the energy loss of the particle after passing through the film to the thickness of the film d. It is shown that this procedure provides overestimated results at low collision energies. Using the computer simulation, the dependence of the ratio of the particle mean trajectory length L in the film to its thickness d on the particle energy E has been obtained. Experimental values of inelastic loss dE/dx for transmission geometry were corrected for the L/d ratio and compared with the results of the “backscattering geometry” experiments. A good agreement of the corrected “transmission” data with the “backscattering” data has been demonstrated for the H-Cu, H-Ag and H-Au systems. The incident particle energies E0 ranged from 0.5 to 20 keV.