Pion-induced double charge exchange on 12C, 24Mg, 32S, and 40Ca.

Angular distributions for pion-induced double-charge-exchange (DCX) reaction have been measured at 164 MeV on the {ital T}=0 target nuclei {sup 12}C, {sup 24}Mg, {sup 32}S, and {sup 40}Ca. The data are compared to calculations using the {Delta}-nucleon interaction model with realistic wave functions and {pi}{ital NN} and {rho}{ital NN} form factors deduced from fits to previously published DCX data on {sup 16}O. The calculations reproduce the general shape of the angular distributions and the absolute magnitude of the cross sections to within a factor of two.