Excitation of Various Levels ofC12andO16by 156-MeV Protons

Abstract

The cross sections and polarizations for the final states $1^{-}$, $1^{+}$, $2^{-}$, $2^{+}$, and $3^{-}$ of ${\mathrm{C}}^{12}$ and $1^{-}$, $2^{-}$, and $3^{-}$ of ${\mathrm{O}}^{16}$ are calculated using the Gillet vectors and the WKB method with the impulse approximation. The WKB method is found to work very well compared with the distorted-wave impulse approximation. Surprisingly good agreement is reached with cross-section data for most cases. Agreement with polarization data is poor. There exists a striking correlation between inelastic electron and proton scattering.