Evidence for the presence of Mn-53 in the early solar system

Details Evidence for the presence of Mn-53 in the early solar system Evidence for the presence of Mn-53 in the early solar system

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..745b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 12, Nov. 1985, p. 745-748.

Physics

75

Manganese Isotopes, Meteoritic Composition, Solar System, Allende Meteorite, Chromium Isotopes, Inclusions, Petrology

Scientific paper

Chromium isotopic anomalies appear to be widespread in the Allende inclusions. Clear anomalies are shown in the 53Cr/52Cr isotopic ratio. Deviations from the terrestrial value are correlated with the Mn/Cr ratios indicating that 53Mn (half life T = 3.7×106y) existed at the time of formation of the meteorite inclusions. The present article presents improved precision measurements on the same inclusions of the Allende meteorite and an extension of the measurements to mineral separates. These results are the first evidence for live 53Mn in the early solar system.

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