Polarized-proton-induced exclusive pion production inC12at 200, 216, 225, 237, and 250 MeV incident energies

The angular distributions of the differential cross sections and analyzing powers are presented for the /sup 12/C(p,..pi../sup +/)/sup 13/C( reaction leading to the ground state of /sup 13/C as well as some of the /sup 13/C( low-lying excited states. The analyzing powers for some of the transitions exhibit a considerable energy dependence while for other transitions they remain relatively unchanged, thus indicating a dynamic sensitivity of the analyzing power dependent on nuclear structure. Comparisons of theoretical predictions for A/sub N/0 and dsigma/d..cap omega.., based on microscopic two-nucleon models, with our results indicate that substantial differences between theory and experiment still exist for A(p,..pi../sup +/)A+1 type of reactions.