Astromers: Nuclear Isomers in Astrophysics**This article is intended for unlimited release under LA-UR-20-22828.
文献类型：期刊论文
| 作者 | Misch,G. Wendell2,3,4,5; Ghorui,Surja K.3,8; Banerjee,Projjwal1; Sun,Yang3,6,7; Mumpower,Matthew R.2,4,5 |
| 刊名 | The Astrophysical Journal Supplement Series
 |
| 出版日期 | 2020-12-17 |
| 卷号 | 252期号:1 |
| ISSN号 | 0067-0049 |
| 关键词 | Nucleosynthesis Stellar nucleosynthesis S-process R-process |
| DOI | 10.3847/1538-4365/abc41d |
| 通讯作者 | Misch,G. Wendell() |
| 英文摘要 | Abstract We develop a method to compute thermally mediated transition rates between the ground state and long-lived isomers in nuclei. We also establish criteria delimiting a thermalization temperature above which a nucleus may be considered a single species and below which it must be treated as two separate species: a ground-state species and an astrophysical isomer (“astromer”) species. Below the thermalization temperature, the destruction rates dominate the internal transition rates between the ground state and the isomer. If the destruction rates also differ greatly from one another, the nuclear levels fall out of or fail to reach thermal equilibrium. Without thermal equilibrium, there may not be a safe assumption about the distribution of occupation probability among the nuclear levels when computing nuclear reaction rates. In these conditions, the isomer has astrophysical consequences and should be treated as a separate astromer species which evolves separately from the ground state in a nucleosynthesis network. We apply our transition-rate methods and perform sensitivity studies on a few well-known astromers. We also study transitions in several other isomers of likely astrophysical interest. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0067-0049-252-1-ABC41D |
| 源URL | [http://119.78.100.186/handle/113462/138581]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Misch,G. Wendell |
| 作者单位 | 1.Discipline of Physics, Indian Institute of Technology Palakkad, Palakkad, Kerala 678557, India 2.Joint Institute for Nuclear Astrophysics—Center for the Evolution of the Elements, USA 3.Department of Physics, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China 4.Center for Theoretical Astrophysics, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA 5.Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA; wendell@lanl.gov 6.China Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China 7.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China 8.Quark Matter Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Misch,G. Wendell,Ghorui,Surja K.,Banerjee,Projjwal,et al. Astromers: Nuclear Isomers in Astrophysics**This article is intended for unlimited release under LA-UR-20-22828.[J]. The Astrophysical Journal Supplement Series,2020,252(1). |
| APA | Misch,G. Wendell,Ghorui,Surja K.,Banerjee,Projjwal,Sun,Yang,&Mumpower,Matthew R..(2020).Astromers: Nuclear Isomers in Astrophysics**This article is intended for unlimited release under LA-UR-20-22828..The Astrophysical Journal Supplement Series,252(1). |
| MLA | Misch,G. Wendell,et al."Astromers: Nuclear Isomers in Astrophysics**This article is intended for unlimited release under LA-UR-20-22828.".The Astrophysical Journal Supplement Series 252.1(2020). |
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来源：近代物理研究所
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