Collective Resonances in Pion Charge Exchange

This dissertation presents new data for the pion single (SCX) and double (DCX) charge exchange reactions. The data measured were from the reactions (pi ^-,pi^0) on ^ {56}Fe and (pi^+, pi^-) on ^{55} Mn, ^{75}As, ^{89}Y, ^{139 }La, ^{165}Ho, and ^{181}Ta. The SCX data were angular distributions measured at beam energies of 120, 164, and 230 MeV. The observations were performed to determine the strengths of the giant resonances: the giant dipole resonance (GDR), the isovector monopole resonance (IVM), and the spin-flip giant dipole resonance (SDR). Calculations of the energy dependence of these resonances are compared to the measured data. The DCX data were measured at a beam energy of 292 MeV and a scattering angle of 5 ^circ. The strength of the double isobaric analog state (DIAS) was determined for each measurement. The observations fill out the set of measurements of the DIAS in odd-A nuclei. The mass dependence of the data is determined and is compared to all known mass dependences for the even -A DIAS data. In addition a table of all previously measured DCX cross sections is included in the appendix.