Experimental Investigations of theC12(h,p)N14Reaction Mechanism

Systematic studies on proton angular distribution and proton-$\gamma$-radiation angular correlations have been carried out on the ${\mathrm{C}}^{12}\mathrm{}(h,p)\mathrm{}{\mathrm{N}}^{14}$ reaction throughout the energy range $4.62\le E_h\le 11.0$ MeV. ($h\equiv {\mathrm{He}}^3$.) Both direct and compound-system reaction amplitudes are present; however, the latter appear to dominate. Striking resonant phenomena are observed, and it is suggested that these correspond to quasigiant resonances in the excitation-energy range from 17 to 23 MeV in ${\mathrm{O}}^{15}$ having a particularly simple structure involving singleproton orbitals coupled to excited ${\mathrm{N}}^{14}$ core configurations. A systematic correlation has been observed between the population of $\mathrm{}\left|m\right|=1\mathrm{}$ magnetic substates of the 7.03-MeV state in the residual nucleus and the appearance of backward peaking in the corresponding proton angular distributions. A crude argument relating these phenomena to the participation of a heavy-particle direct stripping mechanism is suggested.