(n, d)-reactions on medium mass nuclei

An analysis is made of the various mechanisms contributing to the (n, d) reaction on the , and nuclei at incident energies up to 15 MeV. It is shown that the main contribution is given by the pick-up process. The statistical contributions are small, especially for . A model of the (n, d) knock-out reaction, in which restrictions on the available phase space for the proton and the neutron in the deuteron after the knock-out are imposed by a Pauli-blocking function, is suggested and applied. The model is close to that for quasi-deuteron photo-absorption and the knock-out model previously developed. It is shown that the knock-out contribution calculated within this model is generally small, but it leads to some improvement of the description of the existing data for the (n, d) reaction on the three nuclei considered in the low-energy interval.