  Based on the transport model isospin-dependent Boltzmann-Uehling-Uhlenbeck
coupled with a phase-space coalescence afterburner, we studied the effects of
the high-momentum tail (HMT) of nucleon momentum distribution in initialization
in 197Au+197Au reactions at a beam energy of 400 MeV/nucleon with different
impact parameters.We found remarkable impact parameter-dependent HMT effects on
the fragment multiplicity distribution. The average neutron to proton ratio of
produced isotopes is also affected by the HMT. The rapidity distributions of
triton and 3He and their elliptic flows are all evidently affected by the HMT.
All the effects of the HMT on the cluster production in heavy-ion collisions
are centrality dependent.
