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Physical Review C 86 (2012) 044617
New isospin effects in central heavy-ion collisions at Fermi energies
F. Gagnon-Moisan1, E. Galichet1, 2, M.-F. Rivet1, B. Borderie1, M. Colonna, R. Roy, G. Ademard1, 3, M. Boisjoli3, E. Bonnet3, R. Bougault4, A. Chbihi3, J.D. Frankland3, D. Guinet5, P. Lautesse5, E. Legouee4, N. Le Neindre4, L. Manduci3, 6, P. Marini3, P. Napolitani1, M. Pârlog4, P. Pawlowski, E. Rosato, M. Vigilante
For the INDRA collaboration(s)

Isospin e ffects on multifragmentation properties were studied thanks to nuclear collisions between di fferent isotopes of xenon beams and tin targets. It is shown that, in central collisions leading to multifragmentation, the mean number of fragments and their mean kinetic energy increase with the neutron-richness of the total system. Comparisons with a stochastic transport model allow to attribute the multiplicity increase to the multifragmentation stage, before secondary decay. The total charge bound in fragments is proposed as an alternate variable to quantify preequilibrium emission and to investigate symmetry energy e ffects.
1:  IPNO - Institut de Physique Nucléaire d'Orsay
2:  CNAM Paris - Conservatoire National des Arts et Métiers
3:  GANIL - Grand Accélérateur National d'Ions Lourds
4:  LPCC - Laboratoire de Physique Corpusculaire de Caen
5:  IPNL - Institut de Physique Nucléaire de Lyon
6:  EAMEA - Ecole des Applications Militaires de l'Energie Atomique
Dynamique et thermodynamique nucléaire
Physics/Nuclear Experiment
Central nuclear collisions between Xe and Sn – multifragmentation – isospin effects – symmetry term of the nuclear EOS
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