C12C13(π+,p)reaction atTπ=90 and 180MeV

The (${\pi }^{+},p$) reaction has been studied at $T_{\pi }=90\mathrm{} \mathrm{and} 180$ MeV on ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, and at $T_{\pi }=90\mathrm{} \mathrm{and} 170$ MeV on ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$. The resolution was sufficient to resolve many single levels in the residual nuclei, and angular distributions were obtained between laboratory angles of 10° and 115°. A comparison between the present ($\pi ,p$) data and existing high-energy ($p,d$) data in terms of a model assuming intermediate pion exchange in the ($p,d$) reaction indicates that the ($\pi ,p$) reaction is an important cubprocess in the ($p,d$) reaction. The present data also suggest that pion rescattering is likely to be a fundamental part of the ($\pi ,p$) reaction mechanism.