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Evidence for spinodal decomposition in nuclear multifragmentation |
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| Authors: | Borderie B Tăbăcaru G Chomaz P Colonna M Guarnera A Pârlog M Rivet M F Auger G Bacri C O Bellaize N Bougault R Bouriquet B Brou R Buchet P Chbihi A Colin J Demeyer A Galichet E Gerlic E Guinet D Hudan S Lautesse P Lavaud F Laville J L Lecolley J F Leduc C Legrain R Le Neindre N Lopez O Louvel M Maskay A M Normand J Pawlowski P Rosato E Saint-Laurent F Steckmeyer J C Tamain B Tassan-Got L Vient E Wieleczko J P |
| Affiliation: | Institut de Physique Nucléaire, IN2P3-CNRS, F-91406 Orsay Cedex, France. |
| Abstract: | Multifragmentation of a "fused system" was observed for central collisions between 32 MeV/nucleon 129Xe and (nat)Sn. Most of the resulting charged products were well identified due to the high performances of the INDRA 4pi array. Experimental higher-order charge correlations for fragments show a weak but nonambiguous enhancement of events with nearly equal-sized fragments. Supported by dynamical calculations in which spinodal decomposition is simulated, this observed enhancement is interpreted as a "fossil" signal of spinodal instabilities in finite nuclear systems. |
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