Evidence for population of ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ resonant states in the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{16}{}_{}{}^{}\mathrm{O}, \alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}_{}^{*}{}_{}{}^{}$ transfer reaction at 130 MeV incident energy was sought in carbon-carbon coincidence data. Carbon momenta were measured with position sensitive telescopes centered at + 35° and -30°. Despite the fact that the experimental configuration discriminates against the prolific projectile breakup process, few events are observed in the kinematic regions corresponding to the resonances. A Monte Carlo simulation of the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{16}{}_{}{}^{}\mathrm{O}, \alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}_{}^{*}{}_{}{}^{}\to {}_{}{}^{12}{}_{}{}^{}\mathrm{C}+{}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ sequential reaction indicates that the transfer production cross section of resonant states is less than one-fourth the value in the literature based on $\alpha$-particle singles data at 145 MeV incident energy.

NUCLEAR REACTIONS ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}+{}_{}{}^{12}{}_{}{}^{}\mathrm{C}\to {}_{}{}^{12}{}_{}{}^{}\mathrm{C}+{}_{}{}^{12}{}_{}{}^{}\mathrm{C}+\alpha$, $E=130\mathrm{}$ MeV; measured coin. ${\overrightarrow{\mathrm{P}}}_{\mathrm{carbon}}$; compared Monte Carlo simulation ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{16}{}_{}{}^{}\mathrm{O}, \alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}_{}^{*}{}_{}{}^{}\to {}_{}{}^{12}{}_{}{}^{}\mathrm{C}+{}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ reaction.

• Received 12 January 1983

DOI:https://doi.org/10.1103/PhysRevC.27.2649