Experimental Limit to Interstellar 244Pu Abundance

  title={Experimental Limit to Interstellar 244Pu Abundance},
  author={M. Paul and A. Valenta and Irshad Ahmad and Dan Berkovits and C. Bordeanu and S A Ghelberg and Yasuhiro Hashimoto and Allen Hershkowitz and S. Jiang and Takashi Nakanishi and Kazushi Sakamoto},
  journal={The Astrophysical Journal Letters},
  pages={L133 - L135}
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 Earth orbit and may accrete onto Earth after ablation in the atmosphere. A favorable matrix for detection of such extraterrestrial material is presented by deep-sea sediments with very low sedimentation rates (0.8-3 mm kyr-1). We report here on the measurement of Pu isotopic abundances in a 1 kg deep… 

Long-lived radio-isotopes: Unique signatures of close-by supernovae in the past

  • G. KorschinekT. Faestermann
  • Physics
    Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
  • 2019

r-Process Radioisotopes from Near-Earth Supernovae and Kilonovae

The astrophysical sites where r-process elements are synthesized remain mysterious: it is clear that neutron star mergers (kilonovae (KNe)) contribute, and some classes of core-collapse supernovae


We consider the production and deposition on Earth of isotopes with half-lives in the range 105–108 yr that might provide signatures of nearby stellar explosions, extending previous analyses of

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

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,

Solar r-process-constrained actinide production in neutrino-driven winds of supernovae

Long-lived radioactive nuclei play an important role as nucleo-cosmochronometers and as cosmic tracers of nucleosynthetic source activity. In particular, nuclei in the actinide region like thorium,

Cosmic nucleosynthesis: A multi-messenger challenge

Developing a detection method of environmental 244Pu

Neutron star mergers as sites of r-process nucleosynthesis and short gamma-ray bursts

Neutron star mergers have been long considered as promising sites of heavy [Formula: see text]-process nucleosynthesis. We overview the observational evidence supporting this scenario including: the

Short-lived 244Pu points to compact binary mergers as sites for heavy r-process nucleosynthesis

Stars could produce our heavy elements through a rapid neutron-capture process during a supernova or merger of binary stars, but which is it? A study of 244Pu reveals that a rare event with a high



Abundances of Actinides and Short-lived Nonactinides in the Interstellar Medium: Diverse Supernova Sources for the r-Processes

Abundances of 244Pu,235U,238U, and 232Th in the early solar system are about those expected for uniform production over most of galactic history. The inferred abundance of 182Hf is also compatible

Geological Isotope Anomalies as Signatures of Nearby Supernovae

Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material

On deep-ocean as a fossil of a near-earth supernova

Abundances of the elements: Meteoritic and solar

Plutonium-244: Confirmation as an Extinct Radioactivity

The mass spectrum of xenon from spontaneous fission in a laboratory sample of plutonium-244 is precisely what meteoriticists predicted it would be, and the search for an explanation for anomalous fission-like xenon in carbonaceous chondrites can now be narrowed.

Heavy Isotope Abundances in Mike Thermonuclear Device

The Nov. 1, 1952, thermonuclear explosion ( Mike'') /sup 240/,...U/sup 255/ through multiple neutron capture by U/sup 238/. The long-lived products of successive BETA decays from these isotopes were

in uranium minerals and standards