ISF 2.P127

Schematic illustration of the collision between two nuclei with different numbers of protons and neutrons. The symmetry energy
affects the rate at which protons flow relative to neutrons (the black lines) between the target and projectile regions during the collision
[Shi03,Tsa04].

References:
[Shi03] L. Shi and P. Danielewicz, Phys. Rev. C 68, 064604 (2003)
[Tsa04] M.B. Tsang et al., Phys. Rev. Lett. 92, 062701 (2004)