Light-Fragment Emission in Heavy-Ion Reactions Producing Pions and Protons in ¹⁶ O + ²⁷ Al Collisions at 94 MeV/nucleon

Angular and multiplicity distributions of light-charged fragments (1 ⩽ Z ⩽ 8) have been measured at 94 MeV/nucleon incident energy: these distributions are rather similar when triggered either by a pion or by a high-energy proton. In both cases, they show drastic differences with inclusive-fragment production: higher multiplicities and flatter angular distributions as compared to the inclusive ones suggest that pion emission occurs through a violent collision process.