Collective flow and pion production at diogene

Abstract Recent results from the large solid angle detector “DIOGENE” at Saturne (Saclay), for Ne + A and Ar + A reactions at 400, 600 and 800 MeV per nucleon are presented. Several points are selected: 1) The particles azimuthal emission pattern (with respect to the reaction plane) exhibiting preferential out-of-plane emission at c.m. rapidities, 2) The presence of an appreciable amount of collective flow for asymmetric systems and even for (rather) small projectile masses, 3) The first measurements of “flow” and multiplicities for both positive and negative pions, 4) The first measurement of deltas in central relativistic heavy ion collisions.