60Fe and244Pu deposited on Earth constrain the r-process yields of recent nearby supernovae
- 14 May 2021
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 372 (6543) , 742-745
Abstract
Natural plutonium from supernovae: The rapid neutron capture process (r-process) produces many of the heavy chemical elements, but the astrophysical settings where it occurs remain unclear. Leading candidates are neutron star mergers and some types of supernovae. Wallneret al.analyzed the plutonium content of a deep-sea crust sample, identifying a few dozen atoms of the r-process isotope plutonium- 244 that were delivered to Earth within the past few million years. There was a simultaneous signal of iron-60, which is known to be produced in supernovae. Comparing the ratios of these isotopes constrains the relative contributions of supernovae and neutron star mergers to r-process nucleosynthesis.Science, this issue p.742Keywords
Funding Information
- Australian Nuclear Science and Technology Organisation
- Australian Nuclear Science and Technology Organisation (DP140100136)
- Australian Nuclear Science and Technology Organisation (DP180100495)
- Australian Nuclear Science and Technology Organisation (DP180100496)
- Australian Nuclear Science and Technology Organisation (17K05722)
- Australian Research Council (DP140100136)
- Japan Society for the Promotion of Science (17K05722)
- Australian Research Council Discovery (DP140100136)
- Australian Research Council Discovery (DP180100495)
- Australian Research Council Discovery (DP180100496)
- Japan Society for the Promotion of Science (17K05722)
- National Collaborative Research Infrastructure Strategy (NCRIS) Australia
- National Collaborative Research Infrastructure Strategy (NCRIS) Australia
- Australian Research Council (DP180100495)
- Australian Research Council (DP180100496)
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