UC San Diego

Europium Isotopic Abundances in Very Metal Poor Stars**Based on observations obtained with (1) the Keck I Telescope of the W. M. Keck Observatory, which is operated by the California Association for Research in Astronomy (CARA), Inc., on behalf of the University of California and the California Institute of Technology and (2) the H. J. Smith Telescope of McDonald Observatory, which is operated by the University of Texas at Austin.