The proton elastic scattering cross sections for ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ have been measure at eight angles for proton energies from 9.1 to 18.4 MeV. Angular distributions of cross sections and analyzing powers were measured at 20 angles in 7.5° steps over the range of 30° to 155° at ten energies between 10 and 17.5 MeV. A spin-½ on spin-½ phase-shift analysis was performed starting with spin-½ on spin-0 phase shifts obtained from an optical model analysis. The transformation from the ½ on 0 case to the ½ on ½ case, when the second ½ spin is totally ineffective, is presented and utilized. The results suggest that broad resonances are present near $E_x=21.5\mathrm{}$ MeV in ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$.

NUCLEAR REACTIONS ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}(\overrightarrow{p}, p)$; measured $\sigma (E, \theta )$, $E=9.1-18.4\mathrm{}$ MeV; measured $A(E, \theta )$, $E=10-17.5\mathrm{}$ MeV. Phase-shift analyzed. Examined for effects of broad resonances. Enriched targets.

• Received 18 February 1977

DOI:https://doi.org/10.1103/PhysRevC.18.1120