Abstract
Inelastic mean free paths and stopping powers of low-energy electrons in aluminum and copper have been calculated by using the statistical model proposed by Penn [Phys. Rev. B 35(1987)842] and the Local Plasma Approximation (LPA). LPA optical oscillator strengths (OOS), computed from Dirac-Hartree-Slater self-consistent densities under Wigner-Seitz boundary conditions, are compared with experimental OOS. The origin of systematic differences between the LPA and Penn’s mean free paths and stopping powers, already found by other authors, is discussed in terms of the discrepancies between the LPA and the experimental OOS
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