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Cross sections for the elastic recoil of hydrogen isotopes for high energy helium ions

Browning, James F.; Banks, James C.; Wampler, William R.; Doyle, B.L.

Cross-sections for the elastic recoil of hydrogen isotopes, including tritium, have been measured for {sup 4}He{sup 2+} ions in the energy range of 9.0-11.6 MeV. These cross-sections have been measured at a scattering angle of 30{sup o} in the laboratory frame. Cross-sections were measured by allowing a {sup 4}He{sup 2+} beam to fall incident on solid targets of ErH{sub 2}, ErD{sub 2} and ErT{sub 2}, each of 500 nm nominal thickness and known areal densities of H, D, T and Er. The uncertainty in each cross-section is estimated to be {+-}3.2%.