Journal article
Pulse Shape Discrimination of low-energy nuclear and electron recoils for improved particle identification in NaI:Tl
NJ Spinks, LJ Bignell, GJ Lane, A Akber, E Barberio, T Baroncelli, BJ Coombes, JTH Dowie, TK Eriksen, MSM Gerathy, TJ Gray, I Mahmood, BP McCormick, WJD Melbourne, AJ Mitchell, F Nuti, MS Rahman, F Scutti, AE Stuchbery, H Timmers Show all
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment | Published : 2023
Abstract
The scintillation mechanism in NaI:Tl crystals produces different pulse shapes that are dependent on the incoming particle type. The time distribution of scintillation light from nuclear recoil events decays faster than for electron recoil events and this difference can be categorised using various Pulse Shape Discrimination (PSD) techniques. In this study, we measured nuclear and electron recoils in a NaI:Tl crystal, with electron equivalent energies between 2 and 40 keV. We report on a new PSD approach, based on an event-type likelihood; this outperforms the charge-weighted mean-time, which is the conventional metric for PSD in NaI:Tl. Furthermore, we show that a linear combination of the ..
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Awarded by Australian Government
Funding Acknowledgements
The authors would like to thank the technical staff at the ANU Heavy Ion Accelerator Facility for design and construction of the detector housings and beamline hardware, as well as performing detector alignment. The authors would also like to thank Alan Duffy from Swinburne University for the use of this NaI:Tl crystal. This research was supported by the Australian Government through the Australian Research Council Centre of Excellence for Dark Matter Particle Physics (CDM, CE200100008) , the Australian Research Council Discovery Program (DP170101675) , and the International Technology Centre Pacific (ITC-PAC, FA520919PA138) . A.A, B.J.C, J.T.H.D, M.S.M.G, T.J.G B.P.M, and M.J.Z acknowledge the support of the Australian Government Research Training Program. N.J.S, W.J.D.M, and Y.Y.Z acknowledge the support of the Australian Research Council Centre of Excellence for Dark Matter Particle Physics. National Collaborative Research Infrastructure Strategy (NCRIS) Heavy Ion Accelerators (HIA) capability for operation of the Heavy Ion Accelerator Facility is acknowledged.