Figure A08-m45bii1-F1: Smoothed differential cross sections for five different collision energies. (a), (b), (c), (d), (e): Full curves show the measured relative differential cross section, averaged over the interference structures. Absolute differential cross sections, calculated semi-classically and also averaged over the interference structure, have been given by the dashed curves. Use has been made of H₁₂=0.05 eV. (f): At E_i = 29.7 eV the curves show the calculated differential cross section for H₁₂=0.04, 0.05 and 0.07 eV