The reactions ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$)${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Be}$)${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$ were investigated at 100 MeV incident energy. These analog reactions show almost identical features, as expected, because the incident energy is much higher than the Coulomb barriers. Therefore, these reactions represent a powerful reaction-mechanism-independent method of finding corresponding analog states in the residual nuclei. Furthermore, the data are consistent with the assumption that the processes are direct three-nucleon transfers populating highspin states. We identify the states having two-particle, three-hole and three-particle, four-hole configurations coupled to high spins.

• Received 18 May 1973

DOI:https://doi.org/10.1103/PhysRevLett.31.250