Inelastic proton scattering to the non-normal parity $2^{-}$ (8.88 MeV) state in ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ has been used as a means to study the applicability of the random-phase-approximation wave functions for the description of doorway states in the giant resonance region. The transition amplitudes are evaluated in a distorted-wave-approximation. The reaction mechanism is described in terms of a direct and a semidirect process, the latter involving the doorway states. The results of this investigation comprise the microscopic radial transition form factors and a differential cross section analysis for proton energies ranging from 24 to 40 MeV.

NUCLEAR REACTIONS ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(p,p^{\prime })$, $E=24-40\mathrm{}$ MeV; microscopic study of giant resonance region; uses RPA wave functions, DWA.

• Received 27 May 1976

DOI:https://doi.org/10.1103/PhysRevC.14.1369