Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction
文献类型：期刊论文
| 作者 | Shen, Y. P.6; Guo, B.6; deBoer, R. J.7; Li, Z. H.6; Li, Y. J.6; Tang, X. D.8; Pang, D. Y.2,3; Adhikari, S.4; Basu, C.1; Su, J.5 |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2020-04-21 |
| 卷号 | 124期号:16页码:6 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.124.162701 |
| 通讯作者 | Guo, B.(guobing@ciae.ac.cn) ; deBoer, R. J.(rdeboer1@nd.edu) |
| 英文摘要 | The C-12(alpha,gamma)O-16 reaction is one of the most crucial reactions in nuclear astrophysics. The E2 external capture to the O-16 ground state (GS) has not been emphasized in previous analyses but may make a significant contribution to the C-12(alpha,gamma)O-16 cross section depending on the value of the GS asymptotic normalization coefficient (ANC). In the present work, we determine this ANC to be 337 +/- 45 fm(-1/2) through the C-12(B-11, Li-7)O-16 reaction using a high-precision magnetic spectrograph. This sheds light on the existing large discrepancy of more than 2 orders of magnitude between the previously reported ANC values. Based on the new ANC, we experimentally constrain the GS external capture and show that through interference with the high energy tail of the 2(+) subthreshold state, a substantial enhancement in the GS S-E2(300) factor can be obtained (70 +/- 7 keV b) compared to that of a recent review (45 keV b), resulting in an increase of the total S factor from 140 to 162 keV b, which is now in good agreement with the value obtained by reproducing supernova nucleosynthesis calculations with the solar-system abundances. This work emphasizes that the external capture contribution for the ground state transition cannot be neglected in future analyses of the C-12(alpha,gamma)O-16 reaction. |
| WOS关键词 | CROSS-SECTIONS ; C-12(ALPHA ; STARS |
| 资助项目 | National Key Research and Development Project[2016YFA0400502] ; National Natural Science Foundation of China[11490561] ; National Natural Science Foundation of China[11475264] ; National Natural Science Foundation of China[11775013] ; National Natural Science Foundation of China[U1867214] ; Continuous Basic Scientific Research Project[WDJC-2019-13] ; National Science Foundation[Phys-0758100] ; Joint Institute for Nuclear Astrophysics[Phys-0822648] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000527135200005 |
| 出版者 | AMER PHYSICAL SOC |
| 资助机构 | National Key Research and Development Project ; National Natural Science Foundation of China ; Continuous Basic Scientific Research Project ; National Science Foundation ; Joint Institute for Nuclear Astrophysics |
| 源URL | [http://119.78.100.186/handle/113462/140492]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Guo, B.; deBoer, R. J. |
| 作者单位 | 1.Saha Inst Nucl Phys, Nucl Phys Div, Kolkata 700064, India 2.Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China 3.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 4.Techno India Univ, Phys Dept, Kolkata 700091, India 5.Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China 6.China Inst Atom Energy, POB 275,10, Beijing 102413, Peoples R China 7.Univ Notre Dame, Joint Inst Nucl Astrophys, Dept Phys, Notre Dame, IN 46556 USA 8.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Y. P.,Guo, B.,deBoer, R. J.,et al. Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction[J]. PHYSICAL REVIEW LETTERS,2020,124(16):6. |
| APA | Shen, Y. P..,Guo, B..,deBoer, R. J..,Li, Z. H..,Li, Y. J..,...&Liu, W. P..(2020).Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction.PHYSICAL REVIEW LETTERS,124(16),6. |
| MLA | Shen, Y. P.,et al."Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction".PHYSICAL REVIEW LETTERS 124.16(2020):6. |
入库方式： OAI收割
来源：近代物理研究所
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