24–29 Jun 2018
LNGS
Europe/Rome timezone

Characterizing the astrophysical S-factor for 12C + 12C with wave-packet dynamics

25 Jun 2018, 12:30
15m
"E. Fermi" conference room (LNGS)

"E. Fermi" conference room

LNGS

Via G. Acitelli, 22 - 67100 Assergi (Italy)
Oral Cosmology and big bang nucleosynthesis Carbon fusion

Speaker

Alexis Diaz-Torres (University of Surrey)

Description

A quantitative study of the astrophysically important sub-barrier fusion of 12C + 12C will be presented [1]. Low-energy collisions are described in the body-fixed reference frame using wave-packet dynamics within a nuclear molecular picture. A collective Hamiltonian drives the time propagation of the wave-packet through the collective potential-energy landscape. The fusion imaginary potential for specific dinuclear configurations is crucial for understanding the appearance of resonances in the fusion cross section. In contrast to other commonly used methods, such as the potential model and the conventional coupled-channels approach, these new calculations reveal three resonant structures in the S-factor, as shown in Fig. 1. The structures correlate with similar structures in the data. The structures in the data that are not explained are possibly due to cluster effects in the nuclear molecule, which are to be included in the new approach. [1] A. Diaz-Torres and M. Wiescher, 2018, arXiv: 1802.01160 [nucl-th].

Primary author

Alexis Diaz-Torres (University of Surrey)

Co-author

Michael Wiescher (University of Notre Dame)

Presentation materials