Value-assigned pulse shape discrimination for neutron detectors.
2020
Using the waveforms from a digital electronics system, an offline analysis technique on pulse shape discrimination (PSD) has been developed to improve the n-$\gamma$ separation in a bar-shaped NE-213 scintillator that couples to a photomultiplier tube (PMT) at each end. The new improved method, called the "valued-assigned PSD" (VPSD), quantifies the separation between neutrons and gamma rays. Position dependence of PSD can be taken into account and automated using VPSD method. The resulting n-$\gamma$ identification is much improved when compared to the traditional technique that uses the geometric mean (GM) of light outputs from both PMTs.
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