Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...344l..81p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 344, Sept. 15, 1989, p. L81-L84.
Astronomy and Astrophysics
Astrophysics
21
Cosmochemistry, Nuclear Astrophysics, Nuclear Fusion, Samarium Isotopes, Solar System, Abundance, Mass Spectroscopy, Meteoritic Composition, Neodymium Isotopes, Radioactive Decay, Solar System, Samarium 146, Decay, Meteorites, Isotopic Ratios, Abundance, Nucleosynthesis, Neodymium 144, Production Rate, Samples, Meteorite, Laboratory Studies, Ibitira, Morristown, Isotopes, Procedure
Scientific paper
A correlation of Nd-142/Nd-144 with Sm-144/Nd-144 in two meteorites which have a large range in Sm-144/Nd-144 in their constituent mineral phases is presented as evidence for the presence of the p-process nucleus Sm-146 in the early solar system and its alpha-decay into Nd-142. The ratio Sm-146/Sm-144 is estimated to be about 0.015 at the time of solar system formation, 4.56 AE ago. It is suggested that the abundance of Sm-146 is compatible with p-proc ess production rate estimates, but not with the production rate for Sm-146 based on a photodisintegration model for the production of p-process nuclides.
Papanastassiou Dimitri Anastassios
Prinzhofer Alain
Wasserburg Gerald J.
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