Total-cross-section excitation functions for ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$+${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ single and mutual inelastic scattering, and fusion, have been analyzed to yield partial widths of the $J^{\pi }=\left({10}^{+}\right), \left({12}^{+}\right), \mathrm{and} \left({14}^{+}\right)$ gross structure resonances. The results are shown to be consistent with the double-resonances picture in which the strongly collective $2_1^{+}$ inelastic excitations act as doorway states.

• Received 31 January 1978

DOI:https://doi.org/10.1103/PhysRevLett.40.924