Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-09-26
Nucl.Phys. A681 (2001) 426-433
Physics
Nuclear Physics
Nuclear Theory
8 pages (Latex), 7 Postscript figures, CRIS2000 Conference, Acicastello, Italy, May 22-26, (2000), Nucl. Phys. A (in press)
Scientific paper
10.1016/S0375-9474(00)00549-2
We show the possibility of extracting important information on the symmetry term of the Equation of State ($EOS$) directly from multifragmentation reactions using stable isotopes with different charge asymmetries. We study n-rich and n-poor $Sn + Sn$ collisions at $50AMeV$ using a new stochastic transport approach with all isospin effects suitably accounted for. For central collisions a chemical component in the spinodal instabilities is clearly seen. This effect is reduced in the neck fragmentation observed for semiperipheral collisions, pointing to a different nature of the instability. In spite of the low asymmetry tested with stable isotopes the results are showing an interesting and promising dependence on the stiffness of the symmetry term, with an indication towards an increase of the repulsion above normal density.
Baran Václav
Colonna Maria
Maccarone S.
Toro Massimo Di
Wolter Hermann H.
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