Abstract
We discuss the application of digital pulse shape algorithms to n//spl gamma/ pulse shape discrimination (PSD) in boron-10 enriched liquid scintillator, where the use of digital techniques has potential applications for neutron monitors. High-speed flash analog-to-digital converters have opened up new possibilities for scintillator detector systems based upon digital event-by-event data acquisition. Using an 8-bit 1-GS/s waveform digitizer, we sampled the scintillation detector signals with nanosecond time resolution to extract event parameters such as pulse height and rise time. Hence, we have studied the variations in pulse shape and rise times for gamma rays and neutrons and the quality of separation of these events. Even using a simple 10-90% rise-time algorithm, we observe good gamma/neutron separation. We present the PSD figure-of-merit obtained using this digital technique.
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