Nucleon Flow and Fragment Flow in Heavy Ion Reactions

Details Nucleon Flow and Fragment Flow in Heavy Ion Reactions Nucleon Flow and Fragment Flow in Heavy Ion Reactions

1993-08-03

arxiv.org/abs/nucl-th/9308004v1

Phys. Rev. C48 (1993) 2946-2955

Physics

Nuclear Physics

Nuclear Theory

20 pages, PostScript figures, LaTeX with REVTeX and EPSF, KUNS 1213

Scientific paper

10.1103/PhysRevC.48.2946

The collective flow of nucleons and that of fragments in the 12C + 12C reaction below 150 MeV/nucleon are calculated with the antisymmetrized version of molecular dynamics combined with the statistical decay calculation. Density dependent Gogny force is used as the effective interaction. The calculated balance energy is about 100 MeV/nucleon, which is close to the observed value. Below the balance energy, the absolute value of the fragment flow is larger than that of nucleon flow, which is also in accordance with data. The dependence of the flow on the stochastic collision cross section and its origin are discussed. All the results are naturally understood by introducing the concept of two components of flow: the flow of dynamically emitted nucleons and the flow of the nuclear matter which contributes to both the flow of fragments and the flow of nucleons due to the statistical decay.

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