Abstract
Abstract The light output intensity as a function of dose rate from pulsed electron beam excitation was investigated for commercial Pilot B and similar plastic scintillators. Nonlinear responses were observed above about 5 × 10 12 rads/sec. The various possible quenching mechanisms which may be responsible for these saturation effects are discussed, and it is suggested that the dominant quenching mechanism in Pilot B is the absorption of the light emission by mono-negative p-terphenyl ions. This assumption is substantiated by the observation of decreased light transmission during electron excitation at high dose rates.
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