${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$ + ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ elastic scattering has been studied at ten angles from 28.0° to 150.8° in the energy range $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=9.8-17.8\mathrm{}$ MeV. These data, together with supporting data from the ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$ exit channels, show that two strong resonances appear in the elastic scattering at energies of 12.5 and 13.2 MeV. Both resonances are approximately 300 keV wide.

• Received 25 May 1978

DOI:https://doi.org/10.1103/PhysRevLett.41.846