Fusion evaporation-residue cross sections for the Si-28 + C-12 reaction have been measured in the energy range 18 less-than-or-equal-to E(c.m.) less-than-or-equal-to 136 MeV using time-of-flight techniques. Velocity distributions of mass-identified reaction products were used to identify evaporation residues and to determine the complete-fusion cross sections at high energies. The data are in agreement with previously established systematics which indicate an entrance-channel mass-asymmetry dependence of the incomplete-fusion evaporation-residue process. The complete-fusion evaporation-residue cross sections and the deduced critical angular momenta are compared with earlier measurements and the predictions of existing models.

Few-nucleon transfer reactions have been measured for the systems $^{64}\mathrm{Ni}$${+}^{208}$Pb and $^{80}\mathrm{Se}$${+}^{208}$Pb at energies slightly above the Coulomb barrier. Together with previous data, heavy-ion-induced transfer reactions on $^{208}\mathrm{Pb}$ have now been studied with projectiles in the mass range A=12--86. The experimental total reaction cross sections and the yields for quasielastic processes are compared with various theoretical predictions. For the one- and two-nucleon transfer reactions a systematic behavior of the energy- and angle-integrated cross sections is observed. This behavior can be understood within a simple semiclassical model. A comparison of the cross-section ratios between one- and two-neutron and the one- and the two-proton transfer reactions indicates that the two-proton-transfer process shows an enhancement with respect to the one-proton transfer reaction.

We have measured \ensuremath{\gamma} rays in coincidence with $^{12}\mathrm{C}$ fragments from the fission of $^{56}\mathrm{Ni}$ produced with the $^{32}\mathrm{S}$${+}^{24}$Mg reaction at ${\mathit{E}}_{\mathrm{lab}}$=140 MeV. These data provide insight into the fission process in this light system by giving information about the energy and spin sharing between the $^{12}\mathrm{C}$ and $^{44}\mathrm{Ti}$ fragments, and the spin alignment of the lighter, $^{12}\mathrm{C}$ fragment. The spin transfer and the nuclear ``temperature'' at scission deduced from this measurement can be related to the compound-nucleus spin and potential energy at scission. The results indicate a statistical decay process consistent with the predictions of the transition-state model employing newer estimates of the spin- and mass-asymmetry-dependent saddle-point energies and corresponding shapes. No evidence is found for the spin alignment of the $^{12}\mathrm{C}$ fragments, contrary to what might be expected for a deep-inelastic scattering origin of the fully energy damped yields.

Measurements of the (α, 2α) reaction in the GeV region on 16O and 28Si are described. The results are compared with a calculation employing the plane wave impulse approximation (PWIA) and with a calculation employing the distorted wave impulse approximation (DWIA). The PWIA calculation reproduces the shape of the angular distribution of the observed quasi-elastic events. The main effect of the distortion introduced in the DWIA calculation is to attenuate the quasi-elastic cross section by a factor of five. As a consequence, the (α, 2α) reaction in the GeV region is expected to be more useful to measure the spectroscopic factor Neff than in the region below 100 MeV since the attenuation is considerably larger (≈ 103) in the latter case.