Excitation functions and energy-averaged angular distributions have been measured for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{13}{}_{}{}^{}\mathrm{C},\alpha )$ transitions to the 3.66- and 3.89-MeV states in ${}_{}{}^{21}{}_{}{}^{}\mathrm{Ne}$. The similarities observed between these transitions and the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{12}{}_{}{}^{}\mathrm{C},\alpha )$ transition to the 7.83-MeV $2^{+}$ eight-particle, four-hole state in ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ suggest a possible eight-particle, three-hole configuration for the 3.66- and 3.89-MeV states of ${}_{}{}^{21}{}_{}{}^{}\mathrm{Ne}$.

• Received 30 August 1971

DOI:https://doi.org/10.1103/PhysRevLett.27.1296