Arguments based on recent level width and $\alpha$ branching ratio measurements are presented to show that ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ resonances may not be populated by the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{16}{}_{}{}^{}\mathrm{O},\alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ reaction as reported. Recent $\alpha$ spectra obtained at high bombarding energy are explained assuming ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ projectile excitation followed by $\alpha$ emission.

NUCLEAR REACTIONS ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{16}{}_{}{}^{}\mathrm{O},\alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$, $E=60\mathrm{}-100$ MeV, measured $\sigma \left(\theta \right)$, $\Gamma$, ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$, deduced levels.

• Received 5 May 1980

DOI:https://doi.org/10.1103/PhysRevC.23.549