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

TL;DR

This study investigates how sequential decay processes in GEMINI simulations influence isoscaling behavior and the extracted symmetry energy coefficient in medium-to-heavy nuclei, revealing significant decay effects and discrepancies in symmetry energy estimation.

Contribution

It demonstrates the strong impact of sequential decay on isoscaling parameters and shows that the apparent symmetry energy coefficient does not directly reflect the initial value in GEMINI.

Findings

Sequential decay significantly alters isoscaling parameters.

Apparent symmetry energy coefficient does not match initial values.

Decay effects must be considered in symmetry energy analysis.

Abstract

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.