[en] Excitation functions for the yields of ten residual nuclides from the ¹²C + ²⁰Ne reaction have been measured over the range E/sub c.m./ = 11 to 33 MeV in steps of 150 keV. The magnitude and energy dependence of the excitation functions for most partial yields, as well as for the total fusion yield, closely resemble those from the ¹⁴O + ¹⁶O system when compared at the same compound-nuclear excitation energy. The total fusion yield exhibits strong anomalies as E/sub c.m./ = 22.7 and 24.1 MeV, while the ²⁰Ne inelastic scattering yield exhibits a strong uncorrelated structure at E/sub c.m./ = 21.1 MeV. In addition, weaker structure is seen at E/sub c.m./ = 13.6, 16.6, 18.6 and 26.3 MeV in the total fusion yield. The 24.1 resonance corresponds to a characteristic structure in the ¹⁶O + ¹⁶O reaction yields. Both structures appear at the same ³²S excitation energy and are found to be correlated with the transition to a regime of limited fusion. Excitation functions for the yields of eleven residual nuclei from the ¹⁴N + ¹⁴N reaction have been measured over the range E/sub c.m./ = 7 to 25 MeV in steps of ca 250 keV. The magnitude and energy dependence of the excitation functions for the partial yields are very different from those for the ¹²C + ¹⁶O system. The total fusion cross section is similar to that from the ¹²C + ¹⁶O system when compared at the same center of mass energy but appears to saturate at an energy and magnitude which are lower than expected from previous systematics. Small, regular fluctuations can be seen in the fusion cross section at the 1 to 2% level. Excitation functions for the yields of nineteen residual nuclei from the ¹⁴N + ¹⁰B reaction have been measured over the range E/sub c.m./ = 8 to 26 MeV in steps of 250 keV

[en] We have measured small angle correlations between light particles (p,d,t,α) at an energy of 140 for the ¹⁶O+²⁷Al and ¹⁸O+²⁷Al systems. The correlation functions were measured at a laboratory angle of 20 degrees with the Stony Brook LINAC. As for earlier work, the p-p and p-d results from both systems are well fit by a model which assumes statistical emission from an equilibrated compound nucleus. The d-α and α-α results from the two systems can be reproduced if a small amount of decaying excited ⁶Li or ⁸Be are included in the simulation. Finally, the relative two particle yields and deduced ⁸Be yield, which are very different for the two systems, will be compared to predictions based on statistical emission

[en] We have measured for particles of mass 4 to mass 13 from the ¹⁶O + ²⁷Al system at 140 MeV. The narrow timing properties of the SUNY-Stony Brook LINAC made it possible to determine mass from time-of-flight with single element Si detectors. The single element configuration resulted in laboratory energy thresholds which ranged from 1.5 MeV for mass 1 to 5 MeV for mass 13 (primarily limited by the flight path). The angle range covered was 30 degrees to 170 degrees in the laboratory frame. The experimental configuration was optimized to measure emission of these masses from the compound nucleus. The experimental results can be compared to the model predictions based on the assumption of statistical emission. The implications of these results for understanding the previously measured correlation functions involving the breakup of particle unbound resonant states will be discussed

[en] An algorithm which can continuously correct for instrumental drifts in event mode data has been developed. The algorithm is based on exponential averages. Its implementation is simple and its execution fast. (orig.)

[en] The feasibility of resolving protons, deuterons, tritons, and α particles over a large energy range with a single NaI(Tl) scintillator is demonstrated. This is accomplished by combining light output, time-of-flight, and pulse shape information

[en] Excitation functions for the yields of all the residual nuclei from the ²⁸ Si + ^28,30 and ³⁰ Si + ³⁰ Si reactions have been measured via the γ-ray technique for center of mass energies in the region within one and two times the Coulomb barrier.Thirteen elements were identified for the first reaction and ten for the other two. While no structure is shown by the data for the ²⁸ + ²⁸ Si reaction, we have found evidence for intermediate width structure in the 2α and the αpn channels in ²⁸ Si + ³⁰ Si and for broad structure in the total fusion cross sections for ³⁰ Si + ³⁰ Si. Calculations using a barrier penetration model with one free parameter reproduce the experimental results quite well. Evaporation model calculations indicate that the individual structure of the nuclei involved in the respective decay chains might have an important influence upon the deexcitation process at the energies relevant to our experiments. (Author)

[en] Fusion cross sections have been measured for the ²⁸Si + ¹²C system over the energy range 60 MeV <= E²⁸ Si <= 90 MeV. Large structures in the total fusion yield are identified at Esub(cm) = 19.6, 20.6, 22.0, 23.9 and 25.1 MeV. Unlike most systems previously studied, the nucleon decay modes are largely responsible for these anomalies. The structures occur at successive integral values of angular momentum, but do not appear to correlate with known resonances in 180⁰ elastic and inelastic scattering. (orig.)

[en] Excitation functions for the yields of ten residual nuclides from the ₁₂C+₁₂C reaction have been measured over the range E_c.m. = 5.25--20.0 MeV in steps of 125 keV, using ν-ray techniques. Nearly all of the reaction channels, including those with light-particle evaporation, showed strong narrow structures. A qualitative statistical analysis performed on the data gave useful information about the locations of possible nonstatistical structure, based primarily on the very strong cross-channel correlation observed in the data set

[en] The feasibility of resolving protons, deuterons, tritons, and alpha particles over a large energy range with a single NaI(Tl) scintillator is demonstrated. This is accomplished by combining light output, time-of-flight, and pulse shape information. (orig.)

[en] The α-particle yield from ¹²C+¹²C has been measured for E/sub c.m./=12--31.5 MeV. The data exhibit many resonantlike structures, some of which are correlated with inelastic-scattering resonances. An anomalously large yield is observed in the E/sub c.m./=12--18 MeV region. The remarkable similarity in α-particle yields from ¹²C+¹⁶O and ¹²C+¹²C above E/sub c.m./=18 MeV and the abrupt change in the nature of the resonant structure below this energy are discussed