Differential cross sections and analyzing powers are presented for discrete states of ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ up to 21-MeV excitation energy as observed by the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(\overrightarrow{p}, p^{\prime }){}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ reaction at 200 MeV. The results of distorted-wave, impulse-approximation calculations with a 210-MeV free nucleon-nucleon $t$ matrix are compared with the data for most of the transitions. The comparisons are divided into classes that emphasize different aspects of the effective interaction. As a whole, the comparisons are comparable to those at lower energies. However, the description of the 15.11-MeV transition to a $1^{+}$, $T=1\mathrm{}$ state is decidedly inferior. The effects of removing abnormal-parity amplitudes with $S=1\mathrm{}$ are considered for several transitions. In particular, their removal produces good agreement for the 15.11-MeV state.

NUCLEAR REACTIONS ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(\overrightarrow{p}, p^{\prime }){}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, $E=200\mathrm{}$ MeV, measured $\sigma (E_p,\theta )$, $A_y(E_p,\theta )$; $\theta =6\mathrm{}°-60\mathrm{}°$, $E_x=0-21\mathrm{}$ MeV. DWIA analysis.

• Received 1 June 1982

DOI:https://doi.org/10.1103/PhysRevC.26.1800