Abstract
A study has been done of the induced charge density, wake potential, and stopping power of swift unit charges in an electron gas. An extended Thomas-Fermi theory is applied to the internal kinetic energy of the Fermi fluid. The von Weizsa\ifmmode\ddot\else\textasciidieresis\fi{}cker parameter is constrained by the exact Coulomb enhancement of the electron density at the projectile site. Illustrative results for protons and antiprotons are presented.
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