Inelastic Scattering ofO16fromPb208

The inelastic scattering of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ from ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ has been studied at an incident ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ energy of 104 MeV. The angular distributions to the $3^{-}$, $5^{-}$, and $2^{+}$ levels at 2.62, 3.20, and 4.10 MeV in ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ show interference patterns like those expected from the destructive interference of Coulomb and nuclear excitation. The phase, $\alpha$, of the nuclear excitation form factor, is determined to be $\alpha =30\mathrm{}\pm 15°$, in good agreement with the collective model. Transition probabilities deduced from the potential deformations are smaller by a factor of ∼2 than the electromagnetic transition probabilities measured in ($e,e^{\prime }$) or Coulomb excitation.