The (d, α) reaction viewed as a two-step process

The ^{98, 97, 94}Mo(d, α)^{96, 95, 92}Nb and ⁹³Nb(d, α)⁹¹Zr reactions have been studied at 12 MeV bombarding energy. A DWBA analysis using one- and two-step processes has been carried out. The two-step process is found, in general, to dominate the one-step and together give rise to cross-section predictions within a factor of 10 of experiment. The angular distribution patterns are found to be best reproduced by DWBA predictions based on certain L-transfers (“parity violating”) associated with only the two-step process and which play but a minor role in their contribution to the overall cross section.