Nuclear cosmochronometer and universality in the r-process abundance distribution

Details Nuclear cosmochronometer and universality in the r-process abundance distribution Nuclear cosmochronometer and universality in the r-process abundance distribution

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nupha.718..677o&link_type=abstract

Nuclear Physics A, Volume 718, p. 677-679.

Physics

Nuclear Physics

1

Scientific paper

We show that a variety of astrophysical r-process models can be constructed which reproduce the observed universal r-process curve for 56 < Z < 80 nuclei, yet have vastly different abundances for Z > 80 and Z < 56 elements. It is dangerous to use the Th/Eu chronometer to estimate the age of metal deficient stars. We do find, however, that the U/Th production ratio is almost independent of the nucleosynthesis environment and could therefore be good chronometer.

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