New limit of $^{244}$Pu on Earth points to rarity of actinide nucleosynthesis

  title={New limit of \$^\{244\}\$Pu on Earth points to rarity of actinide nucleosynthesis},
  author={Anton Wallner and Th. Faestermann and Jenny Feige and Cyril Feldstein and Klaus Knie and G. Korschinek and Walter Kutschera and Avishai Ofan and M. Paul and Francesca Quinto and Georg Rugel and Peter Steier},
A. Wallner, 2, ∗ T. Faestermann, J. Feige, C. Feldstein, K. Knie, 5 G. Korschinek, W. Kutschera, A. Ofan, M. Paul, F. Quinto, † G. Rugel, ‡ and P. Steier Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, Australia VERA Laboratory, Faculty of Physics, University of Vienna, Währinger Strasse 17, A-1090, Austria Technische Universität München, D-85747 Garching, Germany Racah Institute of Physics, Hebrew University, Jerusalem… 
Long-lived radio-isotopes: Unique signatures of close-by supernovae in the past
  • G. Korschinek, T. Faestermann
  • Physics
    Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
  • 2019
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Astronuclear Physics: A tale of the atomic nuclei in the skies
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Probing the origin of r-process elements in the universe represents a multidisciplinary challenge. We review the observational evidence that probes the properties of r-process sites, and address them
The first direct double neutron star merger detection: Implications for cosmic nucleosynthesis
Context. The astrophysical r-process site where about half of the elements, heavier than iron are produced, has been a puzzle for several decades. Here we discuss the role of one of the leading ideas
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60Fe and 244Pu deposited on Earth constrain the r-process yields of recent nearby supernovae
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The activation method for cross section measurements in nuclear astrophysics
Abstract.The primary aim of experimental nuclear astrophysics is to determine the rates of nuclear reactions taking place in stars in various astrophysical conditions. These reaction rates are an


Evidence for Deposition of Interstellar Material on the Lunar Surface
L. Fimiani, D.L. Cook, T. Faestermann, J.M. Gómez Guzmán, K. Hain, G.F. Herzog, K. Knie, G. Korschinek, B. Ligon, P. Ludwig, J. Park, R.C. Reedy, and G. Rugel. Fakultät für Physik, TU-München, D85748
Attempt to detect primordial 244 Pu on Earth
With a half-life of 81.1 Myr, 244Pu could be both the heaviest and the shortest-lived nuclide present on Earth as a relic of the last supernova(e) that occurred before the formation of the Solar
Astrophysical Shrapnel: Discriminating Among Extra-solar Sources of Live Radioactive Isotopes
We consider the production and deposition on Earth of isotopes with half-lives in the range 10$^{5}$ to 10$^{8}$ years that might provide signatures of nearby stellar explosions, extending previous
Novel method to study neutron capture of 235U and 238U simultaneously at keV energies.
The neutron capture cross sections of the main uranium isotopes, (235)U and (238)U, were measured simultaneously for keV energies, for the first time by combining activation technique and atom counting of the reaction products using accelerator mass spectrometry to confirm the values at the lower band of existing data.
The early solar system abundance of /sup 244/Pu as inferred from the St. Severin chondrite
We describe the analysis of Xe released in stepwise heating of neutron-irradiated samples of the St. Severin chondrite. This analysis indicates that at the time of formation of most chondritic
The Evolution and Explosion of Massive Stars. II. Explosive Hydrodynamics and Nucleosynthesis
The nucleosynthetic yield of isotopes lighter than A = 66 (zinc) is determined for a grid of stellar masses and metallicities including stars of 11, 12, 13, 15, 18, 19, 20, 22, 25, 30, 35, and 40
An upper limit to interstellar 244Pu abundance as deduced from radiochemical search in deep-sea sediment: An account
We report here a search for the “live” 244Pu in 1 kg deep-sea dry sediment collected in 1992 in the North Pacific. After a 546 day alpha-counting of a Pu fraction chemically separated from the
Experimental Limit to Interstellar 244Pu Abundance
Short-lived nuclides, now extinct in the solar system, are expected to be present in the interstellar medium (ISM). Grains of ISM origin were recently discovered in the inner solar system and at