Dynamical aspects of isoscaling

Details Dynamical aspects of isoscaling Dynamical aspects of isoscaling

2005-04-12

arxiv.org/abs/nucl-th/0504036v1

Phys.Rev. C73 (2006) 044601

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1103/PhysRevC.73.044601

The origin and dynamical evolution of isoscaling was studied using classical molecular dynamics simulations of ${}^{40}$Ca + ${}^{40}$Ca, ${}^{48}$Ca + ${}^{48}$Ca, and ${}^{52}$Ca + ${}^{52}$Ca, at beam energies ranging from $20 \ MeV/A$ to $85 MeV/A$. The analysis included a study of the time evolution of this effect. Isoscaling was observed to exist in these reactions from the very early primary isotope distributions (produced by highly {\it non-equilibrated} systems) all the way to asymptotic times. This indicates that isoscaling is independent of quantum effects and thermodynamical equilibrium. In summary, collision-produced isoscaling appears to be due more to the mere partitioning of the proton-neutron content of the participant nuclei, than to specific details of the reaction dynamics.

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