Study of (d, α) Reactions on Some Light Nuclei

Abstract

The angular distributions of the charged particles from the ${\mathrm{N}}^{14}(d, d){\mathrm{N}}^{14}$, ${\mathrm{N}}^{14}(d, {\ensuremath{\alpha}}_{0}){\mathrm{C}}^{12}$, ${\mathrm{N}}^{14}(d, {\ensuremath{\alpha}}_{1}){\mathrm{C}}^{12*}$, and ${\mathrm{N}}^{15}(d, {\ensuremath{\alpha}}_{0}){\mathrm{C}}^{13}$ reactions have been studied with a deuteron bombarding energy of 21 Mev. The charged-particle groups are identified and their energy is measured by a $\frac{\mathrm{dE}}{\mathrm{dX}}$ vs $E$ counter telescope. The $\mathrm{N}(d, \ensuremath{\alpha})\mathrm{C}$ angular distributions and the ${\mathrm{O}}^{16}(d, \ensuremath{\alpha}){\mathrm{N}}^{14}$ angular distribution measured by Freemantle et al. have been compared with theoretical curves calculated from a simplified direct-interaction model. The relative magnitudes of the experimentally determined cross sections have also been compared with theory. The results indicate that the ${\mathrm{O}}^{16}(d, {\ensuremath{\alpha}}_{0})$ reaction can be described by the compound-nucleus extreme, while the ${\mathrm{N}}^{14}(d, {\ensuremath{\alpha}}_{1})$ process appears to favor description by a direct-interaction model. The remaining ($d, \ensuremath{\alpha}$) reactions are intermediate cases.