Abstract
The elastic scattering cross sections for proton scattering from He4 were determined in the proton energy region of 1.4–6.0 MeV. The measurements were performed at laboratory angles of 110°–170° for proton energies of 1.4–2.7 MeV and at angles of 140° and 170° for proton energies of 2.7–6.0 MeV. The scattering cross sections for H1 recoils by He4 ion bombardment for helium energies of 5.6–24 MeV at recoil angles of 4°–28° were calculated by kinematically reversing the reaction. The helium targets were prepared by implanting 60 keV He4 ions into thin tantalum foils. The helium concentration was determined by transmission elastic recoil detection analysis employing 10 MeV Si28 ions. The obtained cross section data are compared with the available literature values. Differences up to 10% are found in the values at the cross section curve maximum in comparison to earlier data.
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