The stripping reactions ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$(d,n) and ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$(${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^6{}_{}{}^{}\mathrm{He}$) have been measured to determine the location of proton single particle strengths in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$. While both reactions populate states above 18 MeV excitation in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, (d,n) strongly populates states above this energy, in contrast to (${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^6{}_{}{}^{}\mathrm{He}$), where almost no strength is observed above 18.3 MeV. The (d,n) spectrum has peaks with the same energy centroids and widths as those observed in medium energy (p,p') measurements at 18.38±0.06 (full width at half maximum =350±60 keV) and 19.55±0.06 MeV (full width at half maximum =575±60 keV), while the peak observed at 20.62±0.06 MeV (full width at half maximum =525±60 keV) is broader than that found in proton scattering. Comparison is made between these results and those for inelastic pion and proton scattering.

NUCLEAR REACTIONS ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$(d,n), $E=12\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$. ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ energy centroids and widths for unbound levels, deduced spectroscopic factors. ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$(${}_{}{}^7{}_{}{}^{}\mathrm{Li}$,${}_{}{}^6{}_{}{}^{}\mathrm{He}$), $E=34\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$. Deduced final single particle orbits in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and spectroscopic factors.

• Received 20 June 1983

DOI:https://doi.org/10.1103/PhysRevC.28.1594