Shear viscosity of hot nuclear matter by the mean free path method
The shear viscosity of hot nuclear matter is investigated by using the mean free path method within the framework of the isospin-dependent quantum molecular dynamics model. Finite size nuclear sources at different density and temperature are initialized based on the Fermi-Dirac distribution. The results show that shear viscosity to entropy density ratio decreases with the increase of temperature and tends toward a constant value for rho similar to rho(0), which is consistent with the previous studies on nuclear matter formed during heavy-ion collisions. At rho similar to 1/2 rho(0), a minimum of eta/s is seen at around T = 10 MeV and a maximum of the multiplicity of intermediate mass fragment (M-IMF) is also observed at the same temperature which is an indication of the liquid-gas phase transition.