Modified astrophysical S-factor of ~(12)C+~(12)C fusion reaction at sub-barrier energies
文献类型：期刊论文
| 作者 | Li Y J3; Fang X2 ; Bucher B1; Li K A4; Ru L H4; Tang X D4
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| 刊名 | Chinese Physics. C
 |
| 出版日期 | 2020 |
| 卷号 | 44期号:11 |
| 关键词 | carbon burning ~(12)C+~(12)C fusion statistical model quasi-molecular resonance astrophysical S-factor reaction rate stellar evolution |
| ISSN号 | 1674-1137 |
| 英文摘要 | The ~(12)C+~(12)C fusion reaction plays a crucial role in stellar evolution and explosions.Its main open reaction channels include , p, n, and 8Be.Despite more than a half century of efforts, large differences remain among the experimental data of this reaction measured using various techniques.In this work, we analyze the existing data using a statistical model.Our calculation shows the following: 1)the relative systematic uncertainties of the predicted branching ratios decrease as the predicted ratios increase;2)the total modified astrophysical S-factors (S* factors)of the p and channels can be obtained by summing the S* factors of their corresponding ground-state transitions and the characteristic rays, while taking into account the contributions of the missing channels to the latter.After applying corrections based on branching ratios predicted by the statistical model, an agreement is achieved among the different data sets at E_(cm) >4 MeV, while some discrepancies remain at lower energies, suggesting the need for better measurements in the near future.We find that the S* factor recently obtained from an indirect measurement is inconsistent with the direct measurement value at energies below 2.6 MeV.We recommend upper and lower limits for the ~(12)C+~(12)C S* factor based on the existing models.A new ~(12)C+~(12)C reaction rate is also recommended. |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6843559 |
| 源URL | [http://119.78.100.186/handle/113462/138604]  |
| 专题 | 中国科学院近代物理研究所 |
| 作者单位 | 1.Idaho National Laboratory 2.中山大学 3.中国原子能科学研究院 4.中国科学院近代物理研究所 |
| 推荐引用方式 GB/T 7714 | Li Y J,Fang X,Bucher B,et al. Modified astrophysical S-factor of ~(12)C+~(12)C fusion reaction at sub-barrier energies[J]. Chinese Physics. C,2020,44(11). |
| APA | Li Y J,Fang X,Bucher B,Li K A,Ru L H,&Tang X D.(2020).Modified astrophysical S-factor of ~(12)C+~(12)C fusion reaction at sub-barrier energies.Chinese Physics. C,44(11). |
| MLA | Li Y J,et al."Modified astrophysical S-factor of ~(12)C+~(12)C fusion reaction at sub-barrier energies".Chinese Physics. C 44.11(2020). |
入库方式： OAI收割
来源：近代物理研究所
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