Transport description of dissipative heavy ion collisions at Fermi energies

• Published in: Bulletin of the Russian Academy of Sciences. Physics 2014-11, Vol.78 (11), p.1131-1136
• Main Authors: Mikhailova, T. I., Erdemchimeg, B., Artukh, A. G., Lukyanov, S. M., Sereda, Yu. M., Di Toro, M., Wolter, H. H.
• Format: Article
• Language: English
• Subjects: Collision dynamics; Dissipation; Fragmentation; Fragments; Hadrons; Heavy Ions; Ionic collisions; Isotopes; Nuclear Physics; Physics; Physics and Astronomy; Proceedings of the International Conference “Nuclei-2013: Fundamental Problems and Applications of Nuclei Physics” (LXIII International Meeting on Nuclear Spectroscopy and the Structure of Atomic Nuclei); Transport
• ISSN: 1062-8738; 1934-9432
• DOI: 10.3103/S1062873814110197

Peripheral collisions of heavy ions at Fermi energies are a powerful tool for producing new isotopes far from stability line. The mechanism of these reactions has features between direct and dissipative reactions, as is seen from the velocity distributions of the projectile-like fragments, which are peaked near the beam velocity and have a long tail to the smaller velocities. In this report we treat these heavy ion collisions in a Boltzmannlike transport approach, which describes the evolution of the phase space distribution function under the influence of a mean field and a two-body collision term. It is used to calculate the primary fragments after the collision phase, which are, however, still highly excited. The de-excitation of the fragments is calculated in a statistical model. We calculate isotope distributions and velocity spectra for the reaction of 40 Ar as a projectile on targets of 9 Be and 181 Ta at E / A = 57 MeV and find reasonably good agreement with experimental data.