Studies of the system 14N+14N with a jet gas target

In this thesis measurements with a jet gas target on the system 14N+14N for energies between 8 and 18 MeV (c.m.) are described. Spectroscoped were the channels p+27Al(=173.40), α+24Mg (=174.60 and 89.30), 8Be+20Ne (=1.60 and 11.00), and 12C+16O(=174.60) and 12C+16O(=10.70) were measured for the whole energy range. Contrarily to the studies on the system 12C+16O which leads also to the compound nucleus 28Si the measurements of this thesis give no hints to resonance structures. The energy-averaged excitation functions of 14N(14N,α)24Mg and 14N(14N,p)27Al agree well with statistical model calculations. The energy-averaged excitation function of the 12Csub(g.s.)+16Osub(g.s.) channel can be sufficiently described by statistical model calculations. However calculations for the channels 12Csup(*)+16Osub(g.s.), 12Csub(g.s.)+16Osup(*), as well 8Be+20Ne yield considerably smaller cross sections compared with the experimental data. This discrepancy indicates direct contributions. The optical model parameters used in the Hauser-Feshbach formalism for the calculation of the transmission coefficients were obtained for the entrance channel 14N+14N by a fit to the elastic cross sections of other measurements. (orig./HSI)