Directional Neutrino Detection with PROSPECT

The Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) detects reactor antineutrinos through inverse beta decay (IBD) at a short baseline range of 7-9m from the U-235 fission isotope core of the High Flux Isotope Reactor (HFIR). The PROSPECT detector has a segmented design of 154 optically separated segments filled with a Li-6 loaded liquid scintillator with high light yield properties that allows for precise event localization. Antineutrinos are detected through IBD by tracking the location of the reaction products, a positron, and a neutron, which undergo annihilation and delayed neutron capture on Li-6 respectively. On average the neutron retains the directional aspect of the antineutrino, which allows for a spatial displacement measurement to reconstruct the direction of the neutrino. My analysis uses data taken with the PROSPECT detector from March to October of 2018, there were 95.6 (73.1) calendar-days of reactor-on (-off) data. Data results are compared to Monte Carlo simulations. I present an analysis of the mean displacement of prompt and delayed IBD events that agrees with the known location of the HFIR reactor with respect to the PROSPECT detector.