LGB Crystals in Plastic for Anti-Neutrino Detection and $^{3}$He Replacement

Scintillating lithium gadolinium borate (LGB) crystals have a high neutron capture cross-section and a long scintillation decay constant. By mixing small shards into a clear plastic matrix, neutrons can be moderated to allow for easier capture within the high capture cross-section crystal. If the plastic is scintillating, the combination can be used to measure an anti-neutrino flux. A non-scintillating plastic makes for a possible solid-state replacement for He-3 tubes. We present experimental data from both kinds of detector, with a focus on neutron efficiency and gamma identification or rejection. We explore Monte Carlo models to determine the optimal LGB content, and present preliminary results from using pulse shape analysis to reduce systematic effects.