  A detector material or configuration that can provide an unambiguous
indication of neutron capture can substantially reduce random coincidence
backgrounds in antineutrino detection and capture-gated neutron spectrometry
applications. Here we investigate the performance of such a material, a
composite of plastic scintillator and
$^6$Li$_6^{nat}$Gd$(^{10}$BO$_{3})_{3}$:Ce (LGB) crystal shards of ~1 mm
dimension and comprising 1% of the detector by mass. While it is found that the
optical propagation properties of this material as currently fabricated are
only marginally acceptable for antineutrino detection, its neutron capture
identification ability is encouraging.
