BIMODALITY AND LATENT HEAT OF GOLD NUCLEI

Eric Bonnet (1)

1 GANIL - Grand Accélérateur National d'Ions Lourds

Peripheral collisions give access to a set of events where hot quasi-projectile (QP) sources are produced exploring a large range of excitation energy. In this range evaporation and multifragmentation are both observed for a similar charge/size of the sources. In this work, this experimental fact will be described in terms of coexistence of two classes of events in the first order phase transition formalism. For this, a detailed study of the experimental correlation between the size/charge of the biggest cluster/fragment (Z1) and the excitation energy (E*) is made. Making the parallel with the same correlation derived from the canonical ensemble description, a first value of the latent heat and boundaries of spinodal and coexistence zone are extracted.

Mots clés: phase transition; finite system; fragmentation; spinodal and coexistence zone; hot nuclei

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Eric Bonnet. BIMODALITY AND LATENT HEAT OF GOLD NUCLEI. International Workshop on Multifragmentation and Related Topics (IWM) 2009, Nov 2009, Catania, Italy. pp.0. ⟨hal-00457444⟩