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

Summary, in English

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 analyzed 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.

• Author: 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
• Department/s: Nuclear physics
• Publishing year: 2022-09-11
• Language: English
• Publication/Series: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• Volume: 1039
• Links: http://dx.doi.org/10.1016/j.nima.2022.167141
• Document type: Journal article
• Publisher: Elsevier
• Topic: Accelerator Physics and Instrumentation
• Keywords: EJ 305; Figure-of-merit; NE 213A; Pulse-shape discrimination; Time-of-flight
• Status: Published
• ISBN/ISSN/Other: ISSN: 0168-9002