Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ap%26ss..30..275b&link_type=abstract
Astrophysics and Space Science, vol. 30, Oct. 1974, p. 275-290.
Astronomy and Astrophysics
Astrophysics
19
Abundance, Actinide Series, Cosmic Rays, Heavy Nuclei, Peculiar Stars, Stellar Radiation, Nuclear Astrophysics, Radioactive Isotopes, Stellar Evolution, Time Dependence
Scientific paper
Recently synthesized (t not greater than about 1 b.y.) r-process material has actinide elemental and isotopic abundance characteristics which can be used to distinguish it from ancient r-process material. The time-dependence of relative actinide abundances provides detailed chronometric information. Also it is shown that, if N = 184 is a neutron magic number as predicted by nuclear theory, the resulting r-process production peak at about A equal to 281 will in turn yield, due to symmetric fission, a broad abundance peak around A values of 135-140. The present results can be used to help verify or refute some current hypotheses concerning the origin of UH cosmic rays and some of the abundance anomalies in peculiar stars.
Bernard Blake J.
Schramm David N.
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