Phase transition dynamics for hot nuclei

B. Borderie (1) , N. Le Neindre (2) , M.F. Rivet (1) , P. Désesquelles (3) , Eric Bonnet (4) , R. Bougault (2) , A. Chbihi (5) , D. Dell'Aquila (1) , Q. Fable (5) , J.D. Frankland (5) , Emmanuelle Galichet (1, 6) , D. Gruyer (2) , D. Guinet (7) , M. La Commara , I. Lombardo , O. Lopez (2) , L. Manduci (2, 8) , P. Napolitani (1) , M. Pârlog (2) , E. Rosato , R. Roy , P. St-Onge (5) , G. Verde , E. Vient (2) , M. Vigilante , J.P. Wieleczko (5)

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 LPCC - Laboratoire de physique corpusculaire de Caen
3 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
4 SUBATECH - Laboratoire de physique subatomique et des technologies associées
5 GANIL - Grand Accélérateur National d'Ions Lourds
6 CNAM - Conservatoire National des Arts et Métiers [CNAM]
7 IPNL - Institut de Physique Nucléaire de Lyon
8 EAMEA - Ecole des applications militaires de l'énergie atomique

An abnormal production of events with almost equal-sized fragments was theoretically proposed as a signature of spinodal instabilities responsible for nuclear multifragmentation in the Fermi energy domain. On the other hand finite size effects are predicted to strongly reduce this abnormal production. High statistics quasifusion hot nuclei produced in central collisions between Xe and Sn isotopes at 32 and 45 A  MeV incident energies have been used to definitively establish, through the experimental measurement of charge correlations, the presence of spinodal instabilities. N/Z influence was also studied.

Mots clés: Quasifusion reactions; Nuclear multifragmentation; Spinodal instabilities; Phase transition dynamics; N/Z effects

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

B. Borderie, N. Le Neindre, M.F. Rivet, P. Désesquelles, Eric Bonnet, et al.. Phase transition dynamics for hot nuclei. Phys.Lett.B, 2018, 782, pp.291-296. ⟨10.1016/j.physletb.2018.05.040⟩. ⟨hal-01807031⟩