Fast neutron and gamma ray pulse shape discrimination in EJ-276 and EJ-276G plastic scintillators

In this paper, we report on the scintillation properties and pulse shape discrimination (PSD) performance of new plastic scintillators, EJ-276 and EJ-276G. Cylindrical samples with dimensions of 1x1 inch and 2x2 inches were tested. Additionally, four samples 2x2 inches in size were used in stack configurations in order to measure the PSD characteristics of large samples (up to 2x8 inches). The paper covers the measurements of neutron/gamma discrimination, emissio spectra, photoelectron yield, and analysis of the light pulse shapes originating from events related to gamma-rays and fast neutrons. The results were compared to data recorded previously using plastic scintillators EJ-299-33, EJ-299-33G, EJ-299-34, EJ-299-34G, and an EJ-301 liquid scintillator.