The (${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$) and (${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$) reactions on targets of ${}_{}{}^{54}{}_{}{}^{}\mathrm{Fe}$ and ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$ have been studied at bombarding energies far above the Coulomb barrier: $E\left({}_{}{}^{12}{}_{}{}^{}\mathrm{C}\right)=78\mathrm{}$ MeV and $E\left({}_{}{}^{16}{}_{}{}^{}\mathrm{O}\right)=104\mathrm{}$ MeV, respectively. The reaction mechanism appears to be direct and is adequately described with the distorted-wave Born approximation, provided recoil effects are included. A comparison of heavy-ion and light-ion analyses permits $j$ assignments to be made for some levels by utilizing the $j$ dependence of the heavy-ion reactions.

NUCLEAR REACTIONS ${}_{}{}^{54}{}_{}{}^{}\mathrm{Fe}$(${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$), ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$(${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$), $E=104\mathrm{}$ MeV; ${}_{}{}^{54}{}_{}{}^{}\mathrm{Fe}$(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$), ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$), $E=78\mathrm{}$ MeV; measured $\sigma (E_f,\theta )$; DWBA analysis; ${}_{}{}^{55}{}_{}{}^{}\mathrm{Co}$ and ${}_{}{}^{63}{}_{}{}^{}\mathrm{Cu}$ levels deduced $j$ values and spectroscopic factors. Resolution 100-200 keV.

• Received 27 June 1974

DOI:https://doi.org/10.1103/PhysRevC.10.1846