par Scamps, Guillaume ;Hashimoto, Yukio
Référence Physical Review C, 100, 2, 024623
Publication Publié, 2019-08-01
Article révisé par les pairs
Résumé : Background: The density-constrained time-dependent Hartree-Fock method is currently a tool of choice to predict fusion cross sections. However, it does not include pairing correlations, which have been found recently to play an important role. Purpose: To describe the fusion cross section with a method that includes the superfluidity and to understand the impact of pairing on both the fusion barrier and cross section. Method: The density-constrained method is tested first on the following reactions without pairing, O16+O16 and Ca40+Ca40. A new method is developed, the density-constrained time-dependent Hartree-Fock-Bogoliubov method. Using the Gogny-TDHFB code, it is applied to the reactions O20+O20 and Ca44+Ca44. Results: The Gogny approach reproduces the experimental data well for reaction O16+O16 and Ca40+Ca40. The DC-TDHFB method is coherent with the TDHFB fusion threshold. The effect of the phase-lock mechanism is shown for those reactions. Conclusions: The DC-TDHFB method is a useful new tool to determine the fusion potential between superfluid systems and to deduce their fusion cross sections.