Proposed Lunar Measurements of r-Process Radioisotopes to Distinguish the Origin of Deep-sea 244 Pu

Proposed Lunar Measurements of r-Process Radioisotopes to Distinguish the Origin of Deep-sea 244 Pu

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 simulation...

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Veröffentlicht in:The Astrophysical journal 2023-05, Vol.948 (2), p.113
Hauptverfasser: Wang 王, Xilu 夕露, Clark, Adam M., Ellis, John, Ertel, Adrienne F., Fields, Brian D., Fry, Brian J., Liu, Zhenghai, Miller, Jesse A., Surman, Rebecca
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container_issue 2
container_start_page 113
container_title The Astrophysical journal
container_volume 948
creator Wang 王, Xilu 夕露
Clark, Adam M.
Ellis, John
Ertel, Adrienne F.
Fields, Brian D.
Fry, Brian J.
Liu, Zhenghai
Miller, Jesse A.
Surman, Rebecca
description 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.
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title Proposed Lunar Measurements of r-Process Radioisotopes to Distinguish the Origin of Deep-sea 244 Pu
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