Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...237l..21m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 237, Apr. 1, 1980, p. L21-L23.
Astronomy and Astrophysics
Astrophysics
6
Krypton Isotopes, Late Stars, Meteoritic Composition, Neutrons, Nuclear Capture, Carbonaceous Chondrites, Half Life, Meteoroids, Nuclear Fusion, Stellar Structure, Xenon Isotopes, Meteorites, Krypton, Neutrons, Capture, Isotopic Ratios, Data, Murchison Meteorite, C2 Chondrites, Nucleosynthesis, Experiments, Orgueil Meteorite, Comparisons, Samples, Meteorite, Time Dependency
Scientific paper
A krypton fraction enriched in s-process isotopes was extracted from a mineral fraction of the Murchison C2 chondrite. The (Kr-86)/(Kr-84) ratio is enhanced by 6 standard deviations, showing that significant amounts of Kr-86 were made in the s-process, despite the short, 10.8 yr beta-decay half-life of its precursor, Kr-85. Judging from this sample, the mean neutron capture time in the s-process was on the order of 5-100 yr for nuclei with cross sections of 125 mb.
Anders Edward
Lewis Reed S.
Matsuda Jun-Ichi
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