Quantum Monte Carlo calculations of pion scattering from Li

We show that the neutron and proton transition densities predicted by recent quantum Monte Carlo calculations for $A=6,7\mathrm{}$ nuclei are consistent with pion scattering from ${}^6\mathrm{Li}$ and ${}^7\mathrm{Li}$ at energies near the $\Delta$ resonance. This has provided a microscopic understanding of the enhancement factors for quadrupole excitations, which were needed to describe pion inelastic scattering within the nuclear shell model of Cohen and Kurath.