Dynamical aspects of isoscaling

The origin and dynamical evolution of isoscaling was studied using classical molecular dynamics simulations of $^{40}\mathrm{Ca}+^{40}\mathrm{Ca}$, $^{48}\mathrm{Ca}+^{48}\mathrm{Ca}$, and $^{52}\mathrm{Ca}+^{52}\mathrm{Ca}$ at beam energies ranging from 20 to 85 MeV/nucleon. The analysis included a study of the time evolution of this effect. Isoscaling was observed to exist at all energies in these reactions from the early primary isotope distributions (produced by systems not yet in thermal equilibrium) all the way to 5000 fm/c.