On strontium isotopic anomalies and odd-A p-process abundances

Details On strontium isotopic anomalies and odd-A p-process abundances On strontium isotopic anomalies and odd-A p-process abundances

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224l..93c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 224, Sept. 1, 1978, p. L93-L95.

Astronomy and Astrophysics

Astrophysics

19

Abundance, Nuclear Fusion, Solar System, Strontium Isotopes, Cosmology, Galactic Evolution, Meteoritic Composition

Scientific paper

Several aspects of the nucleosynthesis of Sr isotopes are considered in an attempt to shed light on the problem of the Sr isotopic anomalies discovered in an inclusion of the Allende meteorite. Decomposition of the Sr isotopes into average r-, s-, and p-process nucleosynthetic classes is performed. It is suggested that the Allende inclusion most likely has an excess of s-process Sr and that the initial Sr-87/Sr-86 isotopic ratio is probably slightly more primitive than basaltic achondrites. The results also show that Sn-115 is mostly due to the r-process and that odd-A yields are very small. It is concluded that if the Sr anomaly in the inclusion is an average s enhancement, it argues somewhat in favor of a model of gas/dust fractionation of s and r isotopes during accumulation of the inclusion parent in the protosolar cloud.

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