A model for multifragmentation in heavy-ion reactions

Abstract

From an experimental point of view, clear signatures of multifragmentation have been detected by different experiments. On the other hand, from a theoretical point of view, many different models, built on the basis of totally different and often even contrasting assumptions, have been provided to explain them. In this contribution we show the capabilities and the shortcomings of one of this models, a QMD code developed by us and coupled to the nuclear de-excitation module taken from the multipurpose transport and interaction code FLUKA, in reproducing the multifragmentation observations recently reported by the INDRA collaboration for the reaction Nb + Mg at a 30 MeV/A projectile bombarding energy. As far as fragment production is concerned, we also briefly discuss the isoscaling technique by considering reactions characterized by a different isospin asymmetry, and we explain how the QMD + FLUKA model can be applied to obtain information on the slope of isotopic yield ratios, which is crucially related to the symmetry energy of asymmetric nuclear matter.

8 pages, 2 figures, Proc. 12th International Conference on Nuclear Reaction Mechanisms, Varenna, Italy, June 15 - 19 2009

References in corpus (16)

• Reaction Dynamics with Exotic Beams
• Isotopic Scaling in Nuclear Reactions
• Constraint Molecular Dynamics approach to Fermionic systems
• Density dependence of the symmetry energy and the nuclear equation of state: A Dynamical and Statistical model perspective
• Isospin fractionation and isoscaling in dynamical nuclear collisions
• The physics models of FLUKA: status and recent development
• Antisymmetrized molecular dynamics of wave packets with stochastic incorporation of Vlasov equation
• Bimodality: a possible experimental signature of the liquid-gas phase transition of nuclear matter
• Isospin Effects in Nuclear Multifragmentation
• Thermal and Chemical Freeze-out in Spectator Fragmentation
• The role of bulk energy in nuclear multifragmentation
• Mass parameters for relative and neck collective motions in heavy ion fusion reactions
• Isotopic Composition of Fragments in Nuclear Multifragmentation
• Multifragmentation threshold in ^{93}Nb+{nat}Mg collisions at 30 MeV/nucleon
• A Monte Carlo approach to study neutron and fragment emission in heavy-ion reactions
• A fully microscopical simulation of nuclear collisions by a new QMD model