Isoscaling Behaviour in the Isospin-Dependent Quantum Molecular Dynamics Model

The isoscaling behaviour is investigated in a frame of isospin-dependent quantum molecular dynamics models. The isotopic yields ratio Y₂/Y₁ for reactions ⁴⁸Ca+⁴⁸Ca and ⁴⁰Ca+⁴⁰Ca at different entrance channels are simulated and presented, the relationship between the isoscaling parameter and the entrance channel is analysed, the results show that α and β reduce with the rise of incident energies and increase with the impact parameter b, which can be attributed to the temperature varying of the pre-fragments in different entrance channels. The relation of α and symmetry-term coefficient C_sym reveals that the chemical potential difference Δμ is sensitive to the symmetry-term coefficient C_sym, and raises with the increasing C_sym.