Instrumentation of a Stilbene Scintillation Detector

This paper describes the electronic instrumentation of a stilbene scintillation detector which is used as a neutron spectrometer. In this application, the spectrum of scintillations caused by protons from (n,p) reactions must be measured and recorded for further analysis. The proton scintillations are separated from the electron scintillations by a double delay-line, pulse-shape discriminator. The discriminating circuit also provides a linear, shaped output for pulse-height analysis. The unique features of this spectrometer are that the criterion for pulse-shape discrimination is well defined and easily optimized, and that the separated spectra of both types of ionizing particles are obtained simultaneously.