Nuclear Chronometers
arXiv:astro-ph/0101438 · doi:10.1142/9789812810830_0043
Abstract
Observations of metal-poor Galactic halo stars indicate that the abundance pattern of the (heaviest) neutron-capture elements is consistent with the scaled solar system r-process abundances. Utilizing the radioactive (r-process) element thorium, age determinations have been made for several of these same stars, placing constraints on both Galactic and cosmological age estimates.
6 pages, 2 figures. To appear in the Proceedings of ``Cosmic Evolution''