The excitation region in ${}^{12}\mathrm{C}$ from $7\mathrm{MeV}<E_x<60\mathrm{}\mathrm{MeV}$ was studied with inelastic scattering of 240-MeV α particles at small angles including 0° where $E0\mathrm{}$ strength is enhanced. The strengths of known $0^{+}$ states at $E_x=7.655\mathrm{}\mathrm{MeV}$ and $E_x=10.3\mathrm{}\mathrm{MeV}$ were obtained and $E0\mathrm{}$ strength was observed to be distributed between $E_x=14\mathrm{}\mathrm{MeV}$ and $E_x=30\mathrm{}\mathrm{MeV}$ with a centroid of $21.5\pm 0.4\mathrm{MeV}$ and an rms width of $3.1\pm 0.2\mathrm{MeV}$ containing $14.5\pm 4.0\%$ of the isoscalar $E0\mathrm{}$ energy-weighted sum rule. Angular distributions and strengths of the $E_x$$=4.439\mathrm{}\mathrm{MeV}{2}^{+},$ $9.641\mathrm{MeV}{3}^{-},$ and $10.844\mathrm{MeV}{1}^{-}$ states were also obtained.

• Received 25 November 1997

DOI:https://doi.org/10.1103/PhysRevC.57.2748