Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the 7Be + n Reactions Updates the Total 7Be Destruction Rate
文献类型：期刊论文
| 作者 | Hayakawa,S.5; La Cognata,M.6; Lamia,L.6,7,9; Yamaguchi,H.5,8; Kahl,D.4; Abe,K.5; Shimizu,H.5; Yang,L.5; Beliuskina,O.5; Cha,S. M.3 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 915期号:1 |
| 关键词 | Big Bang nucleosynthesis Nuclear reaction cross sections Nuclear abundances |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ac061f |
| 通讯作者 | Hayakawa,S.() |
| 英文摘要 | Abstract The cosmological lithium problem (CLP) stems from the outstanding discrepancy between theoretical predictions and astronomical observations of primordial lithium abundances. For the radiogenic production of 7Li, 7Be plays a pivotal role in the Big Bang nucleosynthesis (BBN). Nevertheless, the data for neutron-induced 7Be destruction processes were still sparse, and especially lacked information on the contributions of transitions to the 7Li excited states. In this work, we have determined the 7Be ( n , p 0 ) 7 Li, 7Be ( n , p 1 ) 7 Li*, and 7Be ( n , α ) 4 He reaction cross sections by means of the Trojan Horse method. The present and the previous data were analyzed together by a multichannel R-matrix fit, providing an improved uncertainty evaluation of the ( n , p 0 ) channel and the first-ever quantification of the ( n , p 1 ) contribution in the BBN-relevant energy range. We implemented the revised total reaction rate summing both the ( n , p 0 ) and ( n , p 1 ) contributions in a state-of-the-art BBN code PRIMAT. As a consequence, the present nuclear-physics data offers a reduction of the predicted 7Li abundance by about one-tenth, which would impose a stricter constraint on BBN and head us in the correct direction to the CLP solution. |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-915-1-AC061F |
| 出版者 | The American Astronomical Society |
| 源URL | [http://119.78.100.186/handle/113462/136979]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Hayakawa,S. |
| 作者单位 | 1.Faculty of Engineering and Architecture, Kore University of Enna, Cittadella Universitaria, I-94100 Enna, Italy 2.RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan 3.Department of Physics, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea 4.School of Physics and Astronomy, University of Edinburgh, J.C. Maxwell Bldg., P.G. Tait Rd., Edinburgh EH9 3FD, UK 5.Center for Nuclear Study, University of Tokyo, RIKEN Campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; hayakawa@cns.s.u-tokyo.ac.jp 6.Istituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud, Via S. Sofia 62, I-95123 Catania, Italy 7.Department of Physics and Astronomy “Ettore Majorana,” University of Catania, Via S. Sofia 64, I-95123 Catania, Italy 8.National Astronomical Observatory of Japan, Mitaka, 181-8588 Tokyo, Japan 9.Centro Siciliano di Fisica Nucleare e Struttura della Materia, CSFNSM, Catania, Italy 10.Department of Physics and Geology, University of Perugia, Via A. Pascoli, I-06123 Perugia, Italy |
| 推荐引用方式 GB/T 7714 | Hayakawa,S.,La Cognata,M.,Lamia,L.,et al. Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the 7Be + n Reactions Updates the Total 7Be Destruction Rate[J]. The Astrophysical Journal Letters,2021,915(1). |
| APA | Hayakawa,S..,La Cognata,M..,Lamia,L..,Yamaguchi,H..,Kahl,D..,...&Zhang,N. T..(2021).Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the 7Be + n Reactions Updates the Total 7Be Destruction Rate.The Astrophysical Journal Letters,915(1). |
| MLA | Hayakawa,S.,et al."Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the 7Be + n Reactions Updates the Total 7Be Destruction Rate".The Astrophysical Journal Letters 915.1(2021). |
入库方式： OAI收割
来源：近代物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。