A Quasi-Classical Model of Intermediate Velocity Particle Production in Asymmetric Heavy Ion Reactions

Abstract

The particle emission at intermediate velocities in mass asymmetric reactions is studied within the framework of classical molecular dynamics. Two reactions in the Fermi energy domain were modelized, ${}^{58}$Ni+C and ${}^{58}$Ni+Au at 34.5 MeV/nucleon. The availability of microscopic correlations at all times allowed a detailed study of the fragment formation process. Special attention was paid to the physical origin of fragments and emission timescales, which allowed us to disentangle the different processes involved in the mid-rapidity particle production. Consequently, a clear distinction between a prompt pre- equilibrium emission and a delayed aligned asymmetric breakup of the heavier partner of the reaction was achieved.

arXiv comment8 pages, 7 figures. Final version: figures were redesigned, and a new section discussing the role of Coulomb in IMF production was included

References in corpus (3)

• Multifragmentation in Xe(50A MeV)+Sn Confrontation of theory and data
• Study of intermediate velocity products in the Ar+Ni collisions between 52 and 95 A.MeV
• Searching for the Nuclear Liquid-Gas Phase Transition in Au + Au Collisions at 35 MeV/nucleon

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• Short timescale behavior of colliding heavy nuclei at intermediate energies
• Isospin-asymmetric nuclear matter
• Origins of Intermediate Velocity Particle Production in Heavy Ion Reactions
• Isoscaling and the nuclear EOS
• The Neutrino Opacity of Neutron Star Inner Crust
• Dynamics of Fragment Formation in Neutron Rich Matter
• Finite size effects in Neutron Star and Nuclear matter simulations
• Multifragmentation at the balance energy of mass asymmetric colliding nuclei
• Fragmentation of Neutron Star Matter