New isospin effects in central heavy-ion collisions at Fermi energies

F. Gagnon-Moisan, E. Galichet, M.-F. Rivet, B. Borderie, M. Colonna, R. Roy, G. Ademard, M. Boisjoli, E. Bonnet, R. Bougault, A. Chbihi, J. D. Frankland, D. Guinet, P. Lautesse, E. Legouée, N. Le Neindre, L. Manduci, P. Marini, P. Napolitani, M. Pârlog, P. Pawłowski, E. Rosato, and M. Vigilante (INDRA Collaboration)
Phys. Rev. C 86, 044617 – Published 16 October 2012
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  • INTRODUCTION
  • EXPERIMENT
  • COMPACT SHAPE EVENTS FROM CENTRAL…
  • COMPARISON OF DATA WITH A STOCHASTIC…
  • SUMMARY AND CONCLUSIONS
    • References

    Abstract

    Isospin effects on multifragmentation properties were studied thanks to nuclear collisions between different 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 effects.

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    • Received 25 July 2012

    DOI:https://doi.org/10.1103/PhysRevC.86.044617

    ©2012 American Physical Society

    Authors & Affiliations

    F. Gagnon-Moisan1,2,*, E. Galichet1,3, M.-F. Rivet1,†, B. Borderie1, M. Colonna4, R. Roy2, G. Ademard1,5, M. Boisjoli2,5, E. Bonnet5, R. Bougault6, A. Chbihi5, J. D. Frankland5, D. Guinet7, P. Lautesse7,‡, E. Legouée6, N. Le Neindre6, L. Manduci5,8, P. Marini5, P. Napolitani1, M. Pârlog6,9, P. Pawłowski10, E. Rosato11, and M. Vigilante11 (INDRA Collaboration)

    • 1Institut de Physique Nucléaire, CNRS-IN2P3 and Université Paris-Sud 11, F-91406 Orsay, France
    • 2Université Laval, Québec, G1V 0A6 Canada
    • 3Conservatoire National des Arts et Métiers, F-75141 Paris Cedex 03, France
    • 4Laboratori Nazionali del Sud-Istituto Nazionale Fisica Nucleare, I-95123 Catania, Italy
    • 5GANIL, CEA-DSM/CNRS-IN2P3, F-14076 Caen Cedex, France
    • 6LPC Caen, ENSICAEN, Université de Caen, CNRS-IN2P3, F-14050 Caen Cedex, France
    • 7Institut de Physique Nucléaire, UCBL, Université de Lyon, CNRS-IN2P3, F-69622 Villeurbanne Cedex, France
    • 8EAMEA, CC19 50115 Cherbourg-Octeville Cedex, France
    • 9National Institute for Physics and Nuclear Engineering, RO-76900 Bucharest-Măgurele, Romania
    • 10IFJ-PAN, 31-342 Kraków, Poland
    • 11Dipartimento di Scienze Fisiche e Sezione INFN, Università di Napoli “Federico II”, I-80126 Napoli, Italy

    • *Current address: PTB Brauncshweig, Bundesallee 100, 38116 Braunschweig, Germany.
    • †rivet@ipno.in2p3.fr
    • ‡Current address: S2HEP (EA4148), UCBL/ENSL, Université de Lyon, Villeurbanne, France.
    • §http://indra.in2p3.fr/spip/

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    Vol. 86, Iss. 4 — October 2012

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