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arXiv · 2206.00948

Technique for the measurement of intrinsic pulse-shape discrimination for organic scintillators using tagged neutrons

N. Mauritzson·K. G. Fissum·J. R. M. Annand·H. Perrey·R. J. W. Frost·R. Al Jebali·A. Backis·R. Hall-Wilton·K. Kanaki·V. Maulerova-Subert·C. Maurer·F. Messi·E. Rofors
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Abstract

Fast-neutron/gamma-ray pulse-shape discrimination has been performed for the organic liquid scintillators NE 213A and EJ 305 using a time-of-flight based neutron-tagging technique and waveform digitization on an event-by-event basis. Gamma-ray sources and a Geant4-based simulation were used to calibrate the scintillation-light yield. The difference in pulse shape for the neutron and gamma-ray events was analysed by integrating selected portions of the digitized waveform to produce a figure-of-merit for neutron/gamma-ray separation. This figure-of-merit has been mapped as a function of detector threshold and also of neutron energy determined from time-of-flight. It shows clearly that the well-established pulse-shape discrimination capabilities of NE 213A are superior to those of EJ 305. The extra information provided by the neutron-tagging technique has resulted in a far more detailed assessment of the pulse-shape discrimination capabilities of these organic scintillators.

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N. Mauritzson, K. G. Fissum, J. R. M. Annand, H. Perrey, R. J. W. Frost, R. Al Jebali, A. Backis, R. Hall-Wilton, K. Kanaki, V. Maulerova-Subert, C. Maurer, F. Messi, E. Rofors. 2022-06-02. Technique for the measurement of intrinsic pulse-shape discrimination for organic scintillators using tagged neutrons. https://doi.org/10.1016/j.nima.2022.167141

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