| Autor: |
Xilu Wang, Adam M. Clark, John Ellis, Adrienne F. Ertel, Brian D. Fields, Brian J. Fry, Zhenghai Liu, Jesse A. Miller, Rebecca Surman |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
The Astrophysical Journal, Vol 948, Iss 2, p 113 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1538-4357 |
| DOI: |
10.3847/1538-4357/acbeaa |
| Popis: |
^244 Pu has recently been discovered in deep-sea deposits spanning the past 10 Myr, a period that includes two ^60 Fe pulses from nearby supernovae. ^244 Pu is among the heaviest r -process products, and we consider whether it was created in supernovae, which is disfavored by nucleosynthesis simulations, or in an earlier kilonova event that seeded the nearby interstellar medium with ^244 Pu that was subsequently swept up by the supernova debris. We discuss how these possibilities can be probed by measuring ^244 Pu and other r -process radioisotopes such as ^129 I and ^182 Hf, both in lunar regolith samples returned to Earth by missions such as Chang’e and Artemis, and in deep-sea deposits. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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