The ‘‘Fermi shuttle’’ acceleration of electrons in ion–atom collisions, i.e. multiple collision
bouncing off the projectile and target nuclei, can lead to the emission of very energetic electrons
higher than the binary encounter electrons). We performed measurements of the evolution of
yield with the induced perturbation and the target atomic number. The yield increases with the
(ratio of projectile charge and projectile velocity q/vP), which was varied from q/vP 0.2 (weak
(strong perturbation). We also introduce a more realistic scaling parameter, which accounts
electrons on target and projectile, and show that the yields increase as a function of this parameter. projectile,
the Fermi shuttle electron yield increases with the target atomic number. Furthermore,
distribution of the high-energy electrons is exponentially decreasing N(v) exp(nv) and exhibits
the slope n with projectile velocity as in the case of Fermi accelerated deuterons.
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