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Published August 15, 1980 | Published
Journal Article Open

Endemic isotopic anomalies in titanium


Abundances of the titanium isotopes were determined using a new high-precision technique that shows terrestrial, lunar, and bulk meteorite samples to be indistinguishable. Ca-Al-Ti-rich inclusions in the Allende meteorite are found to contain Ti of widely varying isotopic composition reflecting the presence of at least three nucleosynthetic components. The anomalies in Ti appear to be relatively widespread and, when correlated with Ca data, provide a clue to nucleosynthesis in the neighborhood of the iron peak and to the late-stage nucleosynthetic processes which immediately preceded formation of the solar nebula.

Additional Information

© 1980 American Astronomical Society. Received 1980 March 19; accepted 1980 May 9. We acknowledge our ignorance of the detailed nuclear astrophysical processes which produced titanium. We thank the National Science Foundation, the National Aeronautics and Space Administration, and the Swiss National Science Foundation for supporting our efforts to explore these mysteries. Our colleagues Fouad Tera and Thomas Kaiser generously shared their deep knowledge of Ti chemistry with us. W. A. Fowler's long-term interest in the iron peak has been useful in keeping us directed toward a state of quasi-equilibrium. We have profited substantially from discussions of nucleosynthesis with A. G. W. Cameron.

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Published - 1980ApJ___240L__73N.pdf


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