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Microscopic considerations concerning the relation between electron yield and stopping power: Calculations for aluminium and carbon

par Dubus, Alain ;Rösler, Max
Référence Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 115, 1-4, page (251-254)
Publication Publié, 1996-07

Article révisé par les pairs

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Résumé :

It has been evidenced experimentally that, for proton impact on a thick solid target, the ratio Λ of the backward electron yield γB and the electronic stopping power (dE/dx)e is approximately constant over a large energy range (a few keV to several MeV). The macroscopic theoretical models (Sternglass 1957; Schou 1980; ...) assume constancy of this ratio. However, from a microscopic point of view, there is no obvious reason for that. We present in this paper a microscopic calculation (microscopic cross sections and Monte Carlo simulation method for the transport) for proton induced electron emission from aluminium and amorphous carbon. The electron yields and the factors Λ from thick and thin (forward and backward emissions) targets are calculated and compared to experimental results.