Elastic scattering of protons by He-4 was thouroughly studied in Phys. Rev. C15 (1977) 518. Based on different sets of experimental data the R-matrix parameterization of the cross sections was produced. More recent measurements reported in NIM B136-138 (1998) 77 confirmed the consistency of the parameterization and new experimental results. The analysis reported in NIM B174 (2001) 33 also supported the obtained R-matrix parameterization with some corrections. The parameterization of the last paper is presented here. To calculate the cross sections for kinematically reversed recoil process p(4He,p)4He, the identity of the direct and inverse processes in the centre of mass frame of reference is utilized.
Last update 09-12-2014