Polarization and Analyzing-Power Differences in the Excitation of1+States inC12at 150 MeV

Significant differences between the polarization, $P$, and analyzing power, $A$, have been measured in the reaction ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(p, p^{\prime }){}_{}{}^{12}{}_{}{}^{}\mathrm{C}\left(1^{+} \mathrm{states}\right)$ at $E_p=150\mathrm{}$ MeV. It is shown that $P-A$ is different from zero primarily because of that part of the tensor exchange amplitude associated with the transferred quanta, $lsj=111\mathrm{}$, to the nucleus. This amplitude determines a combination of transition density matrix elements for the 15.11-MeV state that is largely undetermined from other experiments.