Absolute cross section for hydrogen forward scattering

The differential cross section for hydrogen recoil scattering from helium ions has been determined for energies in the range 1-3 MeV and forward scattering angles of 20, 25, 30 and 35°. Polystyrene (C8H8)n thin films were used as a reference standard, enabling the recoil cross section to be determined with reference to the backscattering cross section for carbon, which was itself newly determined in terms of the simple Rutherford cross section. © 1992.