12C+12C fusion in a multichannel folding model

6th Nuclear Physics in 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: Coulomb barrier;    Coupled channels;    Density dependent;    Fitting parameters;    Folding modeling;    Nucleon-nucleon interaction;    Optical potential;    Transition density;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012010/pdf
DOI  :  10.1088/1742-6596/665/1/012010

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The12C+12C fusion reaction is investigated using a folding potential in 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. As elastic data are available around the Coulomb barrier, this simultaneous treatment offers a good test for the reliability of the model. In the fusion cross section, the role of the inelastic channels and, in particular of the12C(0+1)+12C(0+2) channel involving the Hoyle state, is discussed.