We report differential cross sections at 40-50 angles (35°-110° c.m.) for ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$-${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ and ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$-${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ elastic scattering. The c.m. energies vary in steps of 200 keV from 5 MeV to ∼18 MeV. For ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$-${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$, some additional data extend to ∼20 MeV. Only at the lower energies does either the optical model or a modified diffraction model satisfactorily describe the data. At the higher energies, weak but broad peaks appear in the excitation curves. Evidence concerning finer structure is inconclusive.

• Received 5 August 1969

DOI:https://doi.org/10.1103/PhysRev.188.1509