  Analyses of the abundances of neutron-capture elements have led to the belief
that these elements in metal-poor stars are r-process products with relative
abundances closely resembling those found in the solar system. This picture was
challenged by Magain (1995), who found that a pure r-process mix of the barium
isotopes was inconsistent with the mix of odd to even barium isotopes derived
from analysis of the Ba II line at 4554 A in the spectrum of the metal-poor
subgiant HD 140283. In this paper, we address Magain's challenge using new high
resolution high signal-to-noise spectra of HD 140283, and find, in contrast to
his result, that a solar-like r-process isotopic mixture provides a fair fit to
the observed 4554 A profile.
