Excitation functions for radioactive isotopes produced by alpha particle induced reactions with silver

Abstract

Stacked foil activation technique and Ge(Li) γ-ray spectroscopy have been used for the determination of the excitation functions, up to 50 MeV, of seven reactions, 107Ag(α, n), (α, 2n), (α, αn), (α, α2n); 109Ag(α, 2n), (α, 3n) and (α, 4n). Since, natural as the target has two odd-mass stable isotopes of about equal abundance, 107Ag(51.83%) and 109Ag(48.17%), their activation in some cases gives the same residual nucleus through different reaction channels, but with very different Q-values. In such cases, the individual reaction cross sections are separated with the help of the ratio of the theoretical cross sections. The theoretical predictions based on a pre-equilibrium exciton model, with an initial exciton configuration of n0 = 5 (5p0h), appear to give a good fit to the experimental data. © 1987.