Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept

Abstract

The electronic stopping cross sections (SCS) of Ta and Gd for slow protons have been investigated experimentally. The data are compared to the results for Pt and Au to learn how electronic stopping in transition and rare earth metals correlates with features of the electronic band structures. The extraordinarily high SCS observed for protons in Ta and Gd cannot be understood in terms of a free electron gas model, but are related to the high densities of both occupied and unoccupied electronic states in these metals.

References in corpus (3)

• Electronic stopping power in gold: The role of d electrons and the H/He anomaly
• Electronic Band Structure Effects in the Stopping of Protons in Copper
• Magnetism of gadolinium: a first-principles perspective

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• Ab-initio simulations and measurements of the free-free opacity in Aluminum
• Trajectory dependence of electronic energy-loss straggling at keV ion energies
• Effect of chemical disorder on the electronic stopping of solid solution alloys
• Electronic friction coefficients from the atom-in-jellium model for $Z=1-92$
• Electronic excitation of transition metal nitrides by light ions with keV energies