Angular differential cross-sections for electron transfer in collisions between proton and He+(1s) ions

Angular differential cross-sections for the formation of H, as a result of electron capture by proton from He+ (1s) at the centre-of-mass energies from 4 to 24 keV, are calculated using distorted wave Coulomb-Born approximation. The total interaction potentials in the prior-interaction channel and in the post-interaction channel are considered. Coulomb boundary conditions are taken care of with the proper choice of the perturbation potentials in both the prior and the post channels. A prior-post discrepancy is noted. Existing theoretical results are presented along with the present results.