Operation of the r-process and cosmochronology

Details Operation of the r-process and cosmochronology Operation of the r-process and cosmochronology

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phr...227..269t&link_type=abstract

Physics Reports, Volume 227, Issue 1-5, p. 269-281.

Physics

19

Scientific paper

The rapid neutron capture process produced about half of the heavy elements in nature beyond the Fe-peak. In the past quite a number of astrophysical sites have been suggested, but none of them has yet been uniquely identified. Without assuming a particular site or model, we deduce the conditions responsible for the production of r-process nuclei by making use of the following information: (1) the solar r-process abundances and (2) nuclear masses and beta decay half lives for nuclei far from stability - in particular experimental information near magic neutron numbers, which determines the shape of the r-process peaks. In addition, we review briefly galactic age determinations based on the long-lived r-process chronometer nuclei 232Th, 235U and 238U.

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