Giant-Resonance Studies via Inelastic Pion Scattering

Abstract

Inelastic scattering of 163- and 241-MeV positive pions by ${}_{}{}^{\mathrm{nat}}{}_{}{}^{}\mathrm{Ca}$ has been studied with special attention paid to the giant-resonance region. Pronounced giant resonance structures are observed at both incident energies. The analysis indicates a strong excitation of the giant quadrupole resonance at 18.2 MeV ($\Gamma \sim 3-3.5$ MeV).