Stopping cross sections of various carbon materials for 4He ions
Review articleOpen access
AbstractWe present a simple model of 0.3–2 MeV 4He stopping cross sections for graphite and diamond. The stopping cross sections can be calculated directly from measured stopping cross sections of methane, ethane and benzene. The effect of delocalized π electrons in graphite on stopping cross section is taken into account by using benzene stopping. Our simplified model agrees better than 4% with experimental values for carbon foils and reproduces the stopping ratio of diamond to graphite. RBS measurements with 1–2 MeV 4He ions on graphitic materials having different densities suggest that the stopping cross section of carbon is sensitive not to the target density but to the chemical bond.
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