New Thermonuclear Rate of 7Li(d,n)24He Relevant to the Cosmological Lithium Problem
文献类型：期刊论文
| 作者 | Hou,S. Q.6,7; Kajino,T.4,5,8; Trueman,T. C. L.1,9; Pignatari,M.1,2,9; Luo,Y. D.4,5; Bertulani,C. A.3 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 920期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac1a11 |
| 通讯作者 | Hou,S. Q.() |
| 英文摘要 | Abstract Accurate 7Li(d,n)24He thermonuclear reaction rates are crucial for precise prediction of the primordial abundances of lithium and beryllium and to probe the mysteries beyond fundamental physics and the standard cosmological model. However, uncertainties still exist in current reaction rates of 7Li(d,n)24He widely used in big bang nucleosynthesis (BBN) simulations. In this work, we reevaluate the 7Li(d,n)24He reaction rate using the latest data on the three near-threshold 9Be excited states from experimental measurements. We present for the first time uncertainties that are directly constrained by experiments. Additionally, we take into account for the first time the contribution from the subthreshold resonance at 16.671 MeV of 9Be. We obtain a 7Li(d,n)24He rate that is overall smaller than the previous estimation by about a factor of 60 at the typical temperature of the onset of primordial nucleosynthesis. We implemented our new rate in BBN calculations, and we show that the new rates have a very limited impact on the final light element abundances in uniform density models. Typical abundance variations are in the order of 0.002%. For nonuniform density BBN models, the predicted 7Li production can be increased by 10% and the primordial production of light nuclides with mass number A > 7 can be increased by about 40%. Our results confirm that the cosmological lithium problem remains a long-standing unresolved puzzle from the standpoint of nuclear physics. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:APJ_920_2_145 |
| 源URL | [http://119.78.100.186/handle/113462/136255]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Hou,S. Q. |
| 作者单位 | 1.Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Hungary 2.Joint Institute for Nuclear Astrophysics, Center for the Evolution of the Elements, Michigan State University, East Lansing, MI 48824, USA 3.Department of Physics and Astromomy, Texas A&M University-Commerce, Commerce, TX 75429, USA 4.Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 5.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; kajino@buaa.edu.cn 6.School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 7.Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China; sqhou@impcas.ac.cn 8.School of Physics, and International Research Center for Big-Bang Cosmology and Element Genesis, Beihang University 37, Xueyuan Road, Haidian-qu, Beijing 100083, People’s Republic of China 9.E. A. Milne Centre for Astrophysics, Department of Physics and Mathematics, University of Hull, Kingston upon Hull HU6 7RX, UK |
| 推荐引用方式 GB/T 7714 | Hou,S. Q.,Kajino,T.,Trueman,T. C. L.,et al. New Thermonuclear Rate of 7Li(d,n)24He Relevant to the Cosmological Lithium Problem[J]. The Astrophysical Journal,2021,920(2). |
| APA | Hou,S. Q.,Kajino,T.,Trueman,T. C. L.,Pignatari,M.,Luo,Y. D.,&Bertulani,C. A..(2021).New Thermonuclear Rate of 7Li(d,n)24He Relevant to the Cosmological Lithium Problem.The Astrophysical Journal,920(2). |
| MLA | Hou,S. Q.,et al."New Thermonuclear Rate of 7Li(d,n)24He Relevant to the Cosmological Lithium Problem".The Astrophysical Journal 920.2(2021). |
入库方式： OAI收割
来源：近代物理研究所
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