System dependence of the correlation function of IMFs in 36Ar + 112,124Sn at 35 MeV/u

The inclusive reduced velocity correlation functions of the intermediate mass fragments were measured in the reactions of 36Ar+112,124Sn at 35 MeV/u. The anti-correlation is observed to be stronger in 36Ar+124Sn system than that in 36Ar+112Sn. The difference of the correlation functions between the two reactions is mainly contributed by the particle pairs with high momenta. A three body Coulomb repulsive trajectory model is employed to calculate the emission time scale of the IMFs for the two systems. The time scale is 150 fm/c in 36Ar+112Sn and 120 fm/c in the 36Ar+124Sn, respectively.