Large negative Ti-50 anomalies in refractory inclusions from the Murchison carbonaceous chondrite - Evidence for incomplete mixing of neutron-rich supernova ejecta into the solar system

Details Large negative Ti-50 anomalies in refractory inclusions from the Murchison carbonaceous chondrite - Evidence for incomplete mixing of neutron-rich supernova ejecta into the solar system Large negative Ti-50 anomalies in refractory inclusions from the Murchison carbonaceous chondrite - Evidence for incomplete mixing of neutron-rich supernova ejecta into the solar system

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..420h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 1, 1987, p. 420-428.

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22

Meteoritic Composition, Murchison Meteorite, Refractory Metals, Stellar Mass Ejection, Supernova Remnants, Titanium Isotopes, Anomalies, Astronomical Models, Nuclear Fusion, Solar System

Scientific paper

The titanium isotopic compositions of several hibonite-rich inclusions from the Murchison carbonaceous chondrite have been measured using an ion microprobe. Several of these inclusions show a considerable deficit in 50Ti compared to terrestrial titanium. This result complements the recent discovery of a hibonite grain from the Murray meteorite with a 10% excess in 50Ti. There is no correlation between the magnitude or sign of the 50Ti anomaly and the mineralogy, chemical composition, inferred initial 26Al/27Al, nuclear anomalies in other isotopes of titanium or isotopic mass fractionation of magnesium, calcium, or titanium. The authors infer that at least 7% of solar system 50Ti was added shortly before formation of the solar system, probably by mixing of ≡5% supernova ejecta into the presolar cloud.

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