The ($n, p$) reaction on the nuclei ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$, ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$, and ${}_{}{}^{51}{}_{}{}^{}\mathrm{V}$ has been studied at 152 MeV. The ground-state transition is clearly detected for ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, but is not resolved for the other nuclei. In all nuclei, a strong excitation with a $Q$ value of about -25 MeV is reported. This is interpreted as an excitation of giant collective multipole resonances. In the lightest elements there is also strong evidence for quasielastic scattering for angles around 20°. Comparisons are made with the medium-energy ($p, n$) and ($p, p^{\prime }$) reactions. Some results are also reported for the ($n, d$) reaction on ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, and ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$.

• Received 15 May 1967

DOI:https://doi.org/10.1103/PhysRev.161.1071