A segmented focal plane detector has been used to study the breakup of 87 MeV ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$ ions incident on a ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ target into ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ fragments at relative energies between 0 and 4 MeV. The relative energy spectra are dominated by sequential breakup of the 9.28 MeV, 10.26+10.33 MeV, and 10.60 MeV excited states in ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$. The measured breakup yields decrease with increasing center-of-mass scattering angle, consistent with predictions made using single-step inelastic distorted wave Born approximation calculations. Applications of this technique to study the breakup of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ at low relative energies will be discussed.

• Received 14 October 1993

DOI:https://doi.org/10.1103/PhysRevC.49.2538