12C+12C and 16O+16O fusion reactions at low energies

NUBA Conference Series -1: Nuclear Physics and Astrophysics

物理学;天文学

Assunção, M.^1 ; Descouvemont, P.^2

Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Campus Diadema, São Paulo

09972-270, Brazil^1

Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles (ULB), C.P. 229, Brussels

B 1050, Belgium^2

关键词: Cluster calculations;    Coupled channels;    Density dependent;    Fitting parameters;    Folding modeling;    Nucleon-nucleon interaction;    Optical potential;    Transition density;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/590/1/012038/pdf
DOI  :  10.1088/1742-6596/590/1/012038

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The12C+12C and16O+16O fusion reactions are investigated in a folding model. We use a multichannel approach involving the12C(0+1, 2+, 0+2, 3-) states. The12C densities (including transition densities) are taken from the RGM calculation of Kamimura. For the nucleon-nucleon interaction, we use the DDM3Y density-dependent interaction. Owing to the explicit presence of inelastic channels, the imaginary part of the optical potential only contains a short-range fusion contribution. The S-factor is then virtually insensitive to the precise value, and the model is free of any fitting parameter. From the coupled-channel system, we determine the elastic and fusion cross sections simultaneously. For the16O+16O fusion cross section, we show preliminary results obtained in a single-channel approximation, where the16O densities is obtained from an α+12C cluster calculation.