Inferences on the evidence for radioactive Mn-53 in the early solar system

Details Inferences on the evidence for radioactive Mn-53 in the early solar system Inferences on the evidence for radioactive Mn-53 in the early solar system

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.324..352l&link_type=abstract

Nature (ISSN 0028-0836), vol. 324, Nov. 27, 1986, p. 352-354.

Computer Science

3

Manganese Isotopes, Protostars, Radioactive Isotopes, Solar System, Stellar Composition, Sun, Abundance, Chromium Isotopes, Cosmochemistry, Nuclear Fusion, Stellar Evolution

Scientific paper

Several now-extinct radionuclides are believed to have been present in the early solar system and have been used to infer the time-scales for various processes during its formation. Birck and Allègre (1985) have reported data suggesting the presence of a new extinct nuclide, 53Mn (mean life τ = 5 Myr). The author shows that their data are inconsistent with the prediction of a single-stage model in which both Mn and its daughter element Cr were isotopically homogeneous. He also explores the virtues and consequences of the three alternative interpretations of the inconsistency: (1) the host material has experienced multiple-stage evolution, (2) 53Mn was heterogeneously distributed, or (3) 53Cr has intrinsic anomalies.

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