Zinc isotope anomalies in Allende meteorite inclusions

Details Zinc isotope anomalies in Allende meteorite inclusions Zinc isotope anomalies in Allende meteorite inclusions

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...360l..59l&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 360, Sept. 10, 1990, p. L59-L62.

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21

Allende Meteorite, Meteoritic Composition, Meteoritic Microstructures, Zinc Isotopes, Calcium Isotopes, Chromium Isotopes, Nuclear Fusion, Refractory Materials, Titanium Isotopes

Scientific paper

The isotopic compositions of Zn, Cr, Ti, and Ca have been measured in a number of CAIs from the Allende meteorite. The aim was to test astrophysical models which predict large excesses of Zn-66 to accompany excesses in the neutron-rich isotopes of Ca, Ti, Cr, and Ni. Some of the CAIs show clearly resolved but small excesses for Zn-66 which are at least an order of magnitude smaller than predicted. This result may simply reflect the volatility and chemical behavior of Zn as compared to the other (more refractory) anomalous elements found in these samples. Alternatively, revision of parameters and assumptions used for the model calculations may be required.

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