  Halo nuclei are excellent examples of few-body systems consisting of a core
and weakly-bound halo nucleons. Where there is only one nucleon in the halo, as
in 11Be, the many-body problem can be reduced to a two-body problem. The
contribution of the 1s1/2 orbital to the ground state configuration in 11Be,
characterized by the spectroscopic factor, S, has been extracted from direct
reaction data by many groups over the past five decades with discrepant
results. An experiment was performed at the Holifield Radioactive Ion Beam
Facility using a 10Be primary beam at four different energies with the goal of
resolving the discrepancy through a consistent analysis of elastic, inelastic,
and transfer channels. Faddeev-type calculations, released after the
publication of the experimental results, show that dynamic core excitation in
the transfer process can lead to reduced differential cross sections at higher
beam energies. This reduction would lead to the extraction of decreasing values
of S with increasing beam energy. A 10Be(d,p) measurement at Ed greater than 25
MeV is necessary to investigate the effects of core excitation in the reaction.
