New 142,144Nd \(n,γ\) Cross Sections and the s-process Origin of the Nd Anomalies in Presolar Meteoric Silicon Carbide Grains

Details New 142,144Nd \(n,γ\) Cross Sections and the s-process Origin of the Nd Anomalies in Presolar Meteoric Silicon Carbide Grains New 142,144Nd \(n,γ\) Cross Sections and the s-process Origin of the Nd Anomalies in Presolar Meteoric Silicon Carbide Grains

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvl..78.2704g&link_type=abstract

Physical Review Letters, Volume 78, Issue 14, April 7, 1997, pp.2704-2707

Physics

20

Scientific paper

We have made improved measurements of the 142,144Nd\(n,γ\) cross sections and investigated the s-process nucleosynthesis in the Ce-Nd-Sm region. Recently discovered anomalies of the Nd isotopes in silicon carbide grains from the Murchison meteorite have been interpreted in terms of pure s-process material from an AGB star. With previous cross section data the s-process origin could not be confirmed, whereas our new data convincingly support the interpretation that these isotopic anomalies were carried into the early solar system inside carbon dust particles that condensed in outflowing winds of presolar AGB stars.

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