Influence of statistical sequential decay on isoscaling and symmetry energy coefficient in a GEMINI simulation

Extensive calculations on isoscaling behavior with the sequential-decay model gemini are performed for the medium-to-heavy nuclei in the mass range A = 60-120 at excitation energies up to 3 MeV/nucleon. The comparison between the products after the first-step decay and the ones after the entire-steps decay demonstrates that there exists a strong sequential decay effect on the final isoscaling parameters and the apparent temperature. Results show that the apparent symmetry energy coefficient gamma(app) does not reflect the initial symmetry energy coefficient C(sym) embedded in the mass calculation in the present GEMINI model.