Isospin effects and symmetry energy studies with INDRA

G. Ademard; B. Borderie; A. Chbihi; O. Lopez; P. Napolitani; M. F. Rivet; M. Boisjoli; E. Bonnet; R. Bougault; J. D. Frankland; E. Galichet; D. Gruyer; D. Guinet; M. Kabtoul; G. Lehaut; P. Lautesse; M. La Commara; N. Le Neindre; P. Marini; M. Pârlog; P. Pawłowski; E. Rosato; R. Roy; G. Spadaccini; E. Vient; M. Vigilante; J. P. Wieleczko

doi:10.1140/epja/i2014-14033-x

2021 Impact factor 3.131

Hadrons and Nuclei

Topical issue on Nuclear Symmetry Energy. Guest editors: Bao-An Li, Àngels Ramos, Giuseppe Verde, Isaac Vidaña

Eur. Phys. J. A (2014) 50: 33
https://doi.org/10.1140/epja/i2014-14033-x

Review

Isospin effects and symmetry energy studies with INDRA

INDRA Collaboration
G. Ademard¹, B. Borderie¹, A. Chbihi², O. Lopez³, P. Napolitani¹, M. F. Rivet¹^*, M. Boisjoli²^,4, E. Bonnet², R. Bougault³, J. D. Frankland², E. Galichet¹^,5, D. Gruyer², D. Guinet⁶, M. Kabtoul³, G. Lehaut³, P. Lautesse⁷, M. La Commara⁸, N. Le Neindre³, P. Marini², M. Pârlog³, P. Pawłowski⁸, E. Rosato⁹, R. Roy⁴, G. Spadaccini⁹, E. Vient³, M. Vigilante⁹ and J. P. Wieleczko²

¹ Institut de Physique Nucléaire, CNRS-IN2P3 and Université Paris-Sud 11, F-91406, Orsay cedex, France
² GANIL, CEA-DSM/CNRS-IN2P3, B.P. 5027, F-14076, Caen cedex, France
³ LPC Caen, ENSICAEN, Université de Caen, F-14050, Caen cedex, France
⁴ Université Laval, G1V 0A6, Québec, Canada
⁵ Conservatoire National des Arts et Métiers, F-75141, Paris cedex 03, France
⁶ Institut de Physique Nucléaire, UCBL, Université de Lyon, F-69622, Villeurbanne cedex, France
⁷ S2HEP (EA4148), UCBL/ENSL, Université de Lyon, Villeurbanne, France
⁸ IFJ-PAN, 31-342, Kraków, Poland
⁹ Dipartimento di Scienze Fisiche e Sezione INFN, Università di Napoli “Federico II”, I80126, Napoli, Italy

^* e-mail: rivet@ipno.in2p3.fr

Received: 21 October 2013
Revised: 9 December 2013
Accepted: 13 December 2013
Published online: 26 February 2014

Abstract

The equation of state of asymmetric nuclear matter is still controversial, as predictions at subsaturation as well as above normal density widely diverge. We discuss several experimental results measured in heavy-ion collisions with the INDRA array in the incident energy range 5-80A MeV. In particular an estimate of the density dependence of the symmetry energy is derived from isospin diffusion results compared with a transport code: the potential part of the symmetry energy linearly increases with the density. We demonstrate that isospin equilibrium is reached in mid-central collisions for the two reactions Ni+Au at 52A MeV and Xe + Sn at 32A MeV. New possible variables and an improved modelization to investigate symmetry energy are discussed.

© SIF, Springer-Verlag Berlin Heidelberg, 2014