The confusing situation near $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=18.5\mathrm{}$ MeV in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ can be understood as arising from the presence of overlapping ${10}^{+}$ and ${12}^{+}$ resonances, both of which are exhibited in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{12}{}_{}{}^{}\mathrm{C},\alpha ){}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}(\mathrm{g}.\mathrm{s}.\mathrm{})$. The presence of both in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$)${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(g.s.) has been previously reported by Fletcher et al.

NUCLEAR REACTIONS ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{12}{}_{}{}^{}\mathrm{C},\alpha )$, $E=36.6-37.5\mathrm{}$ MeV; measured $\sigma (E,\theta )$. Legendre polynomial fits.

• Received 13 May 1976

DOI:https://doi.org/10.1103/PhysRevC.14.1271