Isospin Diffusion Observables in heavy ion reactions
  Collisions of 112Sn and 124Sn nuclei, which differ in their isospin asymmetry, provide information about the rate of isospin diffusion and equilibration. While several different probes can provide accurate diffusion measurements, the ratios of the mirror nuclei may be the simplest and most promising one. Ratios of the mass seven mirror nuclei yields are analyzed to show the rapidity, transverse momentum and impact parameter dependence of isospin diffusion. 
T.X. Liu, W.G. Lynch, M.B. Tsang, X.D. Liu, R. Shomin, W.P. Tan, G.   Verde, A. Wagner, H.F. Xi, H.S. Xu, B. Davin, Y. Laroc...