Stopping power of a degenerate electron gas for slow ions:: Role of relative kinematics in Z1-oscillation below the Fermi velocity

Based on the kinetic theory of stopping of a homogeneous electron gas for heavy ions with nuclear charge Z(1), the intrinsic role of relative kinematics in averaged binary energy transfers is investigated for ion velocities below the Fermi velocity. The required quantum mechanical transport cross sections are computed with spherically screened potentials precalculated in the Kohn-Sham approximation at embedding condition. Important changes, as a function of intruder velocities, are established in the Z(1)-oscillation of the resulting stopping power. Comparison of theoretical results with data obtained at surface-channeling condition shows a good agreement at the experimental ion velocity. (c) 2006 Elsevier B.V. All rights reserved.