High-resolution study of (π+,pp), (π+,pd) and other (π+,xx) reactions on 67Li, 14N, and 16O

There is a large amount of high quality two-particle coincidence data from pion annihilation on light nuclei at several energies between 38 and 90 MeV. All of this data is either in the reduction stage or is still the primitive on-line data collected during the monitoring of our recent experiment. The purpose of this paper is twofold: (1) to convey the measuring capability of a coincidence experiment of this type using the most modern experimental apparatus; (2) to give a feeling for the great variety and depth of knowledge which such high quality data can provide concerning pion annihilation in nuclei. The data was obtained by the Carnegie-Mellon nuclear physics group during the last two years at the LEP channel at LAMPF, using two spectrometer systems to detect charged particles in coincidence