supported by the National Natural Science Foundation of China (No.11035009,10979074,10775168 and 10975174);Major State Basic Research Development Program in China (No.2007CB815004);Foundation for Developing Science and Technology in Shanghai (No. 09JC1416800);Knowledge Innovation Project of Chinese Academy ofSciences under (No. KJCX2-EW-N01)
Shear viscosity (η) is a basic transport coefficient of the medium.In this work,we calculate shear viscosity to entropy density ratio (η/S) of an equilibrated system in intermediate energy heavy ion collisions withi...