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Europium, Samarium, And Neodymium Isotopic Fractions In Metal-Poor Stars
We have derived isotopic fractions of europium, samarium, and neodymium in two metal-poor giants with differing neutron-capture nucleosynthetic histories. These isotopic fractions were measured from new high-resolution (R ...
New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars
Elements heavier than the iron group are found in nearly all halo stars. A substantial number of these elements, key to understanding neutron-capture nucleosynthesis mechanisms, can only be detected in the near-ultraviolet. ...