States in ${\mathrm{C}}^{12}$ have been studied using the ${\mathrm{B}}^{11}({\mathrm{He}}^3,d){\mathrm{C}}^{12}$ reaction at a ${\mathrm{He}}^3$ energy of 44.0 MeV. Energy spectra were obtained to 26-MeV excitation in ${\mathrm{C}}^{12}$. The results indicate the presence of a positive-parity state at 11.16 ± 0.05 MeV having a width of 550 ± 100 keV. It is suggested to be the $2^{+}$ member of an $\alpha$-cluster band based on the $0^{+}$ state at 7.65 MeV. There is no evidence of a state at 14.7 MeV. The $4^{-}$, ${\left(p_{\frac{3}{2}}\right)}^{-1\mathrm{}}\left(d_{\frac{5}{2}}\right)$ $T=0\mathrm{}$ and $T=1\mathrm{}$ states are located at 18.27 and 19.56 MeV, respectively. In the region of the giant dipole resonance in ${\mathrm{C}}^{12}$, there is a peak at 22.4 MeV.

• Received 4 May 1970

DOI:https://doi.org/10.1103/PhysRevC.3.442