The calculations are provided for the energy range from Rutherford scattering up to 3.5 MeV. The results reported in Phys. Rev. 112 (1958) 1702 are reproduced in the calculations. More recent measurements performed in the energy range of 1.5 - 2.7 MeV (see NIM B83 (1988) 628) are in a good agreement with calculations except for normalization, which is overestimated by about 5 per cent.
Last update 07-11-2015