Pion spectra for (p,pi(-)) reactions in the Sr-88 region - art. no. 024608

We have calculated the pion spectra of (p,pi(-)) reactions from near thresh old to the Delta region for medium-heavy nuclei with the zero-range plane-w ave approximation supplemented with the cutoff of a radial integral simulat ing the distortion effect. The shell-model wave function with a 1p(1/2)-0g( 9/2),, configuration is used to calculate the two-particle one-hole spectro scopic amplitudes. The excitation spectra leading to both the positive- and the negative-parity states are calculated for Sr-88, Zr-90, and Mo-92 nucl ei. The present model calculation predicts pronounced selectivity of the ex citation of several high-spin states, especially at higher incident energie s.