Energy Reflection Coefficients for 5-10 keV He Ions Incident on Au, Ag, and Cu

Jørgen Schou, H. Sørensen, U. Littmark

    Research output: Contribution to journalJournal articleResearchpeer-review


    The calorimetric deuterium-film method was used for measurements of the energy reflection coefficient γ for normal incidence of 5-10 keV He ions on Cu, Ag and Au. A theoretical calculation of γ by means of transport theory gives fair agreement with the experimental results. The experimental data for all three materials lie on a single curve, if depicted as a function of the reduced energy ε. γ varies from 0.14 to 0.04 with ε varying from 0.2 to 1.6. The calculated data do not show similar behaviour, and the position of each curve depends on the specific beam-target combination. Both the experimental and theoretical results for the He ions are in acceptable agreement with other experimental and theoretical results. For He ions, the experimental γ-values are 20-30% above the values for hydrogen ions for the same value of ε
    Original languageEnglish
    JournalJournal of Nuclear Materials
    Issue number1-2
    Pages (from-to)359-364
    Publication statusPublished - 1978


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