Abstract
We have introduced the nuclear spin-orbit coupling to the isospin-dependent Boltzmann-Uehling-Uhlenbeck transport model for intermediate-energy heavy-ion collisions. Similar to the spin hall effect, we found that the spin-orbit coupling can lead to the splitting of collective flows for spin-up and spin-down nucleons. The detailed properties of the spin-orbit coupling such as its strength, density dependence, and isospin dependence can be studied via spin-related observables in intermediate-energy heavy-ion collisions. We have also improved the coalescence algorithm for cluster formation by explicitly including spin degree of freedom. Further studies of introducing tensor force as well as other interesting spin-related phenomena in intermediate-energy heavy-ion collisions will be discussed.