  The single-nucleon knockout reactions 9Be(14B, 13B + gamma)X and 197Au(14B,
13B + gamma)X, at an incident energy of 60 MeV per nucleon, have been used to
probe the structure of 14B and of the core fragment 13B. A dominant 2s
configuration is deduced for the neutron in the ground state of 14B. The
longitudinal momentum distribution for this state is consistent with "neutron
halo" structure. Spin assignments for 13B excited states at 3.48 and 3.68 MeV
are proposed based on the observed spectroscopic factors for one-neutron
removal.
