Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (2): S20509 doi: 10.13538/j.1001-8042/nst.26.S20509

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2014)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2014) • Previous Articles     Next Articles

Exotic break-up modes in heavy ion reactions up to Fermi energies

Maria Colonna,1 Virgil Baran,2 Stefano Burrello,1 Mariangela Di Prima,1 Paolo Napolitani,3 and Carmelo Rizzo1   

  1. 1INFN-Laboratori Nazionali del Sud, Via S Sofia 62, Catania I-95123, Italy
    2NIPNE-HH, Bucharest University, Bucharest 077125, Romania
    3IPN, CNRS/IN2P3, Universit´e Paris-Sud 11, Orsay cedex 91406, France
  • Contact: Maria Colonna E-mail:colonna@lns.infn.it
  • Supported by:

    Supported by a grant of the Romanian National Authority for Scientific
    Research, CNCS - UEFISCDI (No. PN-II-ID-PCE-2011-3-0972)

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Maria Colonna, Virgil Baran, Stefano Burrello, Mariangela Di Prima, Paolo Napolitani, and Carmelo Rizzo. Exotic break-up modes in heavy ion reactions up to Fermi energies.Nuclear Science and Techniques, 2015, 26(2): S20509     doi: 10.13538/j.1001-8042/nst.26.S20509

Abstract:

We discussed recent studies, within the framework of transport theories, on heavy ion reactions between
charge asymmetric systems, from low up to Fermi energies. We concentrated on the analysis of ternary breakup
events of dynamical origin occurring in semi-central reactions, where the formation of excited systems in various
conditions of shape, excitation energy and spin is observed. At beam energies around 20A MeV, we showed
how this fragmentation mode emerges from the combined action of surface (neck) instabilities and angular
momentum effects, leading to the observation of three aligned massive fragments in the exit channel. At Fermi
energies, a transition towards a prompt emission of small fragments from the neck region with larger relative
velocity with respect to projectile and target remnants is observed. We also focus on isospin sensitive observables,
aiming at extracting information on the density dependence of the isovector part of the nuclear effective
interaction and of the nuclear symmetry energy.

Key words: Low and intermediate energy heavy-ion reactions, Fluctuation phenomena, Equation of State