An interpretation of special and general isotopic anomalies in r-process nuclei

Details An interpretation of special and general isotopic anomalies in r-process nuclei An interpretation of special and general isotopic anomalies in r-process nuclei

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224.1007c&link_type=abstract

Astrophysical Journal, Part 1, vol. 224, Sept. 15, 1978, p. 1007-1012.

Astronomy and Astrophysics

Astrophysics

18

Abundance, Barium Isotopes, Meteoritic Composition, Neodymium Isotopes, Nuclear Fusion, Solar System, Anomalies, Carbonaceous Chondrites, Radioactive Isotopes, Stellar Evolution, Supernovae, Barium, Isotopes, Meteorites, Neutrons, Nucleus, Neodymium, Isotopic Composition, Allende Meteorite, Anomalies, Radioactivity, Abundance, Chemical Composition

Scientific paper

My analysis of new discoveries by McCulloch and Wasserburg of Ba and Nd isotopic anomalies in inclusions of the Allende meteorite argues that (1) these anomalies contain special extinct radioactivities resulting from radioactive decay within grains formed in and ejected from the supernova interior, (2) the inclusions studied are fused assemblies of interstellar grains that were never totally vaporized, and (3) theoretical separation into r and s abundances suggests that fluctuations between r and s components has occurred during the accumulation processes. These points lend support to a new chemical picture of the early solar system that I have developed, although many interpretations remain possible. Measurements of the neutron-capture cross sections of Nd isotopes are urgently needed to experimentally validate these conclusions.

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