Light-fragment emission in heavy-ion reactions producing pions and protons in 16O + 27Al 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-fragments production: higher multiplicities and flatter angular distributions as compared to the inclusive ones suggest that pion emission occurs through a violent collision process