60 Fe and 244 Pu deposited on Earth constrain the r-process yields of recent nearby supernovae-Reference-Cited by-同舟云学术

60 Fe and 244 Pu deposited on Earth constrain the r-process yields of recent nearby supernovae

Published:2021-05-14 Issue:6543 Volume:372 Page:742-745
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Wallner A.¹²^ORCID,Froehlich M. B.¹^ORCID,Hotchkis M. A. C.³^ORCID,Kinoshita N.⁴^ORCID,Paul M.⁵^ORCID,Martschini M.¹^ORCID,Pavetich S.¹^ORCID,Tims S. G.¹^ORCID,Kivel N.⁶,Schumann D.⁶,Honda M.⁷^ORCID,Matsuzaki H.⁸,Yamagata T.⁸^ORCID

Affiliation:

1. Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia.

2. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.

3. Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia.

4. Institute of Technology, Shimizu Corporation, Tokyo 135-8530, Japan.

5. Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

6. Laboratory of Radiochemistry, Department for Nuclear Energy and Safety, Paul Scherrer Institute, 5232 Villigen, Switzerland.

7. Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki 305-8577, Japan.

8. Micro Analysis Laboratory, Tandem Accelerator, The University Museum, The University of Tokyo, Tokyo 113-0032, Japan.

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. Wallner et 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. 742

Funder

Australian Nuclear Science and Technology Organisation

Australian Research Council

Japan Society for the Promotion of Science

Australian Research Council Discovery

National Collaborative Research Infrastructure Strategy (NCRIS) Australia

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference103 articles.

1. The origin of the heavy elements: Recent progress in the understanding of the r-process