A study of 4He backscattering (150°) cross sections for O, Al, and Si atoms in the energy range 0.6-2.3 MeV has been completed. We conclude that the 4He backscattering cross section for these elements follows the E-2 energy dependence of Rutherford backscattering to 1%-2% over this energy range. These results have significant implications for the use of 4He backscattering as a materials analysis tool for low-Z elements.
ASJC Scopus subject areas
- Physics and Astronomy(all)