Pionic Annihilation of Antiprotons Stopped On He-3

The pionic annihilation of antiprotons stopped on He-3 nuclei in a self-shunted streamer chamber exposed to the antiproton beam of LEAR is studied. The data concern charged-particle multiplicity distributions, branching ratios for different final states, the probability of final-state interaction, pi(-), pi(+), p and d momentum spectra, like and unlike pion angular correlations, pion and other charged-particle angular correlations. The comparison of the He-3 data with those obtained on H-1, H-2 and He-4 does not reveal relevant effects due to the increase of the nucleon number; the small differences can be seen as due to a weak final-state interaction.