Lattice gas model for fragmentation: From Argon on Scandium to Gold on Gold

Details Lattice gas model for fragmentation: From Argon on Scandium to Gold on Gold Lattice gas model for fragmentation: From Argon on Scandium to Gold on Gold

1995-12-20

arxiv.org/abs/nucl-th/9512028v1

Phys.Rev.C53:1319-1324,1996

Physics

Nuclear Physics

Nuclear Theory

13 pages, Revtex, 8 figures in ps files, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.53.1319

The recent fragmentation data for central collisions of Gold on Gold are even qualitatively different from those for central collisions of Argon on Scandium. The latter can be fitted with a lattice gas model calculation. Effort is made to understand why the model fails for Gold on Gold. The calculation suggests that the large Coulomb interaction which is operative for the larger system is responsible for this discrepancy. This is demonstrated by mapping the lattice gas model to a molecular dynamics calculation for disassembly. This mapping is quite faithful for Argon on Scandium but deviates strongly for Gold on Gold. The molecular dynamics calculation for disassembly reproduces the characteristics of the fragmentation data for both Gold on Gold and Argon on Scandium.

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