NDLI: Comparison of Pulse Shape Discrimination Methods for Phoswich and CsI:Tl Detectors

Content Provider	IEEE Xplore Digital Library
Author	Chandrikamohan, P. DeVol, T.A.
Copyright Year	1963
Abstract	Comparison of four pulse shape discrimination (PSD) methods was performed on the same digitized pulses from two different detector configurations. Beta/gamma discrimination of ⁹⁰Sr and ¹³⁷Cs was performed using a phoswich detector made of BC400 and BGO scintillators. Alpha/gamma discrimination of ²¹⁰Po and ¹³⁷Cs was performed using a CsI:Tl scintillation crystal. The pulse waveforms were digitized with a DGF-4C and analyzed offline with IGOR Pro software. The four pulse shape discrimination methods that were compared include: constant fraction discrimination (CFD), rise time discrimination (RTD), constant time discrimination (CTD), and charge comparison (CC). The CTD method resulted in a spillover of 9.2% (Figure of Merit, FOM=3.9) and 0.25% (FOM=3.2), while the CC method resulted in a spillover of 9.9% (FOM=3.3) and 0.033% (FOM=3.7) for the phoswich and CsI:Tl detectors, respectively. Although the CTD results in the lowest spillover for high signal-to-noise pulses, the optimized CC method, as implemented here, appears to be the best PSD method overall. Analysis of the reciprocal of the pulse shape data typically resulted in a significantly higher FOM than conventional methods with no reduction in spillover. This simple mathematical transformation of the pulse shape data illustrates that the FOM may not be a good scheme for the quantification of PSD
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	398
Ending Page	403
Page Count	6
File Size	372401
File Format	PDF
ISSN	00189499
Volume Number	54
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse shaping methods Shape Radiation detectors Solid scintillation detectors Pulse measurements Particle measurements Gamma ray detection Gamma ray detectors Ionizing radiation Optical pulse shaping spillover Charge comparison constant fraction discrimination constant time discrimination figure of merit rise time discrimination
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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