Formation and breakup of highly excited nuclear systems in intermediate-energy heavy-ion collisions
Journal Article
·
· Physics of Atomic Nuclei
OSTI ID:183731
- Institute for Nuclear Research, Moscow (Russian Federation)
- Russian Research Centre, Moscow (Russian Federation)
A theoretical analysis of {sup 129}Xe(50 MeV/nucleon) + {sup 197}Au and {sup 197}Au (150 MeV/nucleon) + {sup 197}Au collisions is performed. The initial nonequilibrium stage of the Xe + Au collision is described in the model of quantum molecular dynamics (QND). It is shown that this stage of evolution ends in the formation of thermalized nuclear systems. The breakup of these systems is described in the statistical model of multifragmentation (SMM). Data on the production of intermediate-mass fragments are well reproduced in the case of switching from QMD to the SMM at early stages of the reaction. Simulation of semicentral Au + Au collisions in the QMD model reproduces the observed kinetic energies per nucleon for heavy fragments (i.e., the flow), but underestimates the kinetic energies of light fragments. To reveal the processes and time scales that dominate the reactions, plots of the space-time evolution of the systems are presented. 27 refs., 11 figs., 1 tab.
- OSTI ID:
- 183731
- Journal Information:
- Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 10 Vol. 58; ISSN 1063-7788; ISSN PANUEO
- Country of Publication:
- United States
- Language:
- English
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