The meteoritic chromium isotopic composition and limits for radioactive Mn-53 in the early solar system

Details The meteoritic chromium isotopic composition and limits for radioactive Mn-53 in the early solar system The meteoritic chromium isotopic composition and limits for radioactive Mn-53 in the early solar system

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50..199l&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 50, Feb. 1986, p. 199-206.

Computer Science

2

Chromium Isotopes, Manganese Isotopes, Meteoritic Composition, Planetary Evolution, Solar System, Aluminum 26, Extraction, Histograms, Mass Spectroscopy, Olivine, Meteorites, Chromium, Isotopes, Composition, Radioactivity, Manganese, Solar System, Samples, Meteorite, Anomalies, Decay, Nucleosynthesis, Spinel, Allende, Inclusions, Olivine, Eagle Station, Pallasites, Cv3 Chondrites, Stony Meteorites, Angra Dos Reis, Stony-Iron Meteorites, Achondrites, Silicates, Isotopic Ratios, Heterogeniety, Dilution, Forma

Scientific paper

The isotopic chromium composition of early solar system samples from Allende inclusions was studied to search for anomalies caused by either the decay of the extinct radionuclide Mn-53 or the nucleosynthetic heterogeneities in Cr itself. No isotopic effects were found beyond the limits of detection. The lack of a Cr-53 effect does not support models in which the presolar source for the Al-26 was a massive star, nor does it support a proton irradiation production for Al-26. The lack of detectable Mn-53 effects could be due to late formation of the high Mn/Cr phases and heterogeneity in the Mn-53 distribution in the low Mn/Cr samples.

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