The Stellar β-decay Rate of 134Cs and Its Impact on the Barium Nucleosynthesis in the s-process
文献类型：期刊论文
| 作者 | Li,Kuo-Ang1,8; Qi,Chong7; Lugaro,Maria2,3,4; Yagüe López,Andrés2; Karakas,Amanda I.4,5; den Hartogh,Jacqueline2; Gao,Bing-Shui1,8; Tang,Xiao-Dong1,6,8 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-09-30 |
| 卷号 | 919期号:2 |
| ISSN号 | 2041-8205 |
| 关键词 | Nucleosynthesis Nuclear reaction cross sections Asymptotic giant branch |
| DOI | 10.3847/2041-8213/ac260f |
| 通讯作者 | Li,Kuo-Ang() |
| 英文摘要 | Abstract We have calculated the stellar β-decay rate of the important s-process branching point 134Cs based on the state-of-the-art shell model calculations. At typical s-process temperatures (T ～ 0.2–0.3 GK), our new rate is one order of magnitude lower than the widely used rate from Takahashi and Yokoi (hereafter TY87). The impact on the nucleosynthesis in AGB stars is investigated with various masses and metallicities. Our new decay rate leads to an overall decrease in the 134Ba/136Ba ratio, and well explains the measured ratio in meteorites without introducing the i-process. We also derive the elapsed time from the last AGB nucleosynthetic event that polluted the early solar system to be >28 Myr based on the 135Cs/133Cs ratio, which is consistent with the elapsed times derived from 107Pd and 182Hf. The s-process abundance sum of 135Ba and 135Cs is found to increase, resulting in a smaller r-process contribution of 135Ba in the solar system. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-919-2-AC260F |
| 源URL | [http://119.78.100.186/handle/113462/136249]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Li,Kuo-Ang |
| 作者单位 | 1.School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 2.Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, E?tv?s Loránd Research Network (ELKH), Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary; maria.lugaro@csfk.org 3.ELTE E?tv?s Loránd University, Institute of Physics, Budapest 1117, Pázmány Péter sétány 1/A, Hungary 4.School of Physics and Astronomy, Monash University, VIC 3800, Australia 5.ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Canberra, ACT 2611, Australia 6.Joint Department for Nuclear Physics, Institute of Modern Physics and Lanzhou University, Lanzhou 730000, People’s Republic of China 7.Department of Physics, Royal Institute of Technology, Stockholm, Sweden; chongq@kth.se 8.CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, People’s Republic of China; lika@impcas.ac.cn |
| 推荐引用方式 GB/T 7714 | Li,Kuo-Ang,Qi,Chong,Lugaro,Maria,et al. The Stellar β-decay Rate of 134Cs and Its Impact on the Barium Nucleosynthesis in the s-process[J]. The Astrophysical Journal Letters,2021,919(2). |
| APA | Li,Kuo-Ang.,Qi,Chong.,Lugaro,Maria.,Yagüe López,Andrés.,Karakas,Amanda I..,...&Tang,Xiao-Dong.(2021).The Stellar β-decay Rate of 134Cs and Its Impact on the Barium Nucleosynthesis in the s-process.The Astrophysical Journal Letters,919(2). |
| MLA | Li,Kuo-Ang,et al."The Stellar β-decay Rate of 134Cs and Its Impact on the Barium Nucleosynthesis in the s-process".The Astrophysical Journal Letters 919.2(2021). |
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来源：近代物理研究所
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