Absence of hindrance in a microscopic 12C + 12C fusion study
Journal Article
·
· Physical Review C
- Vanderbilt Univ., Nashville, TN (United States); DOE/OSTI
- The Australian National Univ., Canberra (Australia)
- Vanderbilt Univ., Nashville, TN (United States)
Studies of low-energy fusion of light nuclei are important in astrophysical modeling, with small variations in reaction rates having a large impact on nucleosynthesis yields. Due to the lack of experimental data at astrophysical energies, extrapolation and microscopic methods are needed to model fusion probabilities. To investigate deep sub-barrier 12C+12C fusion cross sections and establish trends for the S factor. Microscopic methods based on static Hartree-Fock and time-dependent Hartree-Fock (TDHF) mean-field theory are used to obtain 12C+12C ion-ion fusion potentials. Fusion cross sections and astrophysical S factors are then calculated using the incoming wave boundary condition method. Both density-constrained frozen Hartree-Fock (DCFHF) and density-constrained TDHF (DC-TDHF) predict a rising S factor at low energies, with DC-TDHF predicting a slight damping in the deep sub-barrier region (≈1 MeV). Comparison between DC-TDHF calculations and maximum experimental cross sections in the resonance peaks are good. However, the discrepancy in experimental low-energy results inhibits interpretation of the trend. Using the fully microscopic DCFHF and DC-TDHF methods, no S factor maximum is observed in the 12C+12C fusion reaction. In addition, no extreme sub-barrier hindrance is predicted at low energies. Furthermore, the development of a microscopic theory of fusion including resonance effects, as well as further experiments at lower energies must be done before the deep sub-barrier behavior of the reaction can be established.
- Research Organization:
- Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0013847
- OSTI ID:
- 1612036
- Alternate ID(s):
- OSTI ID: 1558151
- Journal Information:
- Physical Review C, Journal Name: Physical Review C Journal Issue: 2 Vol. 100; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Influence of the tensor interaction on heavy-ion fusion cross sections
|
journal | November 2019 |
| Influence of the tensor interaction on heavy-ion fusion cross sections | text | January 2019 |
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