The effect of the shift of the effective energy of the pion-nucleon amplitude on the pion-nucleus charge exchange due to isospin splitting of the core is investigated. Calculations are done in both plane wave and distorted wave frameworks.

NUCLEAR REACTIONS ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}({\pi }^{+},{\pi }^0){}_{}{}^{13}{}_{}{}^{}\mathrm{N}$, $E=162\mathrm{}$ MeV, calculated $\sigma \left(\theta \right)$.

• Received 1 December 1980

DOI:https://doi.org/10.1103/PhysRevC.23.2648