@article{fd96d3ccd0e44008983c789bbb4921d6,
title = "Proposed Lunar Measurements of r-Process Radioisotopes to Distinguish the Origin of Deep-sea 244Pu",
abstract = "244Pu has recently been discovered in deep-sea deposits spanning the past 10 Myr, a period that includes two 60Fe pulses from nearby supernovae. 244Pu 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 244Pu that was subsequently swept up by the supernova debris. We discuss how these possibilities can be probed by measuring 244Pu and other r-process radioisotopes such as 129I and 182Hf, both in lunar regolith samples returned to Earth by missions such as Chang{\textquoteright}e and Artemis, and in deep-sea deposits.",
author = "Xilu Wang and Clark, {Adam M.} and John Ellis and Ertel, {Adrienne F.} and Fields, {Brian D.} and Fry, {Brian J.} and Zhenghai Liu and Miller, {Jesse A.} and Rebecca Surman",
note = "We are grateful for illuminating discussions with Terri Brandt and Brian Rauch about SuperTIGER and cosmic rays, and to Toni Wallner and Dominik Koll for discussions of their work. X.W., R.S., and B.D.F. acknowledge many useful discussions in the INT-21-3 workshop on cosmic radioisotopes sponsored by the Institute for Nuclear Theory. The work of X.W. was supported by the US National Science Foundation (NSF) under grant Nos. PHY-1630782 and PHY-2020275 for the Network for Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) and by the Heising-Simons Foundation under award 00F1C7. The work of A.M.C. was supported by the US Nuclear Regulatory Commission Award 31310019M0037 and the National Science Foundation under grant No. PHY-2011890. The work of J.E. was supported partly by the United Kingdom STFC Grant ST/T000759/1 and partly by the Estonian Research Council via a Mobilitas Pluss grant. The work of A.F.E. and B.D.F. was supported by the NSF under grant No. AST-2108589. The work of J.A.M. was supported by the Future Investigators in NASA Earth and Space Science and Technology (FINESST) program under grant No. 80NSSC20K1515. The work of R.S. was supported by N3AS as well as the US Department of Energy under contract Nos. DE-FG02-95-ER40934 and LA22-ML-DE-FOA-2440. R.S. also acknowledges the Aspen Center for Physics, which is supported by NSF grant PHY-2210452.",
year = "2023",
month = may,
day = "1",
doi = "10.3847/1538-4357/acbeaa",
language = "English (US)",
volume = "948",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "2",
}