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Energetic Particle Emission in Heavy-Ion Collisions Around 100 MeV/u

Strong similarities between high-energy proton and subthreshold pion production at large angles in heavy-ion collisions around 100 MeV/u are evidenced. In both cases, light charged particles emitted in coincidence with the pion or the proton exhibit the same features. In addition, by considering the particles (pion or proton) irrespective of their nature and only characterized by the total energy needed for their production, we find that the process is dominated by phase space constraints.