Inelastic excitation of giant resonances by 400-MeVO16

Results are presented for 350- and 400-MeV ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ inelastic scattering from ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ and ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$. The results show excitation of the giant quadrupole, monopole, and dipole resonances. The cross section and peak to continuum ratio are very large for the giant quadrupole resonance. Measured angular distributions agree with distorted-wave Born approximation calculations which use standard collective model form factors. Structure observed in the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ spectra corresponding to high excitation energies in ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ is shown to arise from projectile pickup reactions.