We have studied the quadrupole effects in pion elastic and inelastic scattering from ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$. A single channel α-t cluster model is used to calculate the wave function for the ground and the first excited states of ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$. The quadrupole effects are shown to be appreciably large in pion${\mathrm{-}}^7$Li elastic scattering. We also calculated the second-rank tensor polarization and compared it with the recent experimental data.

• Received 6 December 1993

DOI:https://doi.org/10.1103/PhysRevC.50.321