Reaction Cross Sections forO16with Fe, Ni, Ge, and Zr

Relative excitation functions for the total neutron production and total charged-particle (proton, $\alpha$) production above 2 MeV from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ bombardment of natural targets of Fe, Ni, Ge, and Zr have been measured at ${\theta }_{\mathrm{lab}}={90}^{\circ }$ and in the bombarding energy range from 30 to 60 MeV. For the most part, the onset of reaction product yields agrees well with the barrier heights as determined from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ elastic scattering. Absolute measurements for light charged-particle production were also made on Fe and Ni at ${\theta }_{\mathrm{lab}}={60}^{\circ }$ and in the bombarding energy range from 37 to 60 MeV. Combined with an average number of emitted charged particles calculated from Weisskopf-Ewing evaporation theory and with the effects of angular momentum included, the results when compared to optical-model reaction cross sections suggest a moment of inertia of one half the rigid-body value.