Journal of Radioanalytical and Nuclear Chemistry

, Volume 292, Issue 3, pp 1265–1272 | Cite as

A digital Compton suppression spectroscopy without gamma-ray coincidence-summing loss using list-mode multispectral data acquisition

  • Weihua Zhang
  • Pawel Mekarski
  • Maxime Dion
  • Jing Yi
  • Kurt Ungar


The study demonstrates the advantages of an innovative list-mode multispectral data acquisition system that allows simultaneous creation of several different single, summed, coincident and anticoincident spectra with a single measurement. One of the consequences of list-mode data file offline processing is a reconstructed spectrum with Compton continuum suppression and without any full-energy peak efficiency deduction owing to true coincidence summing. The spectrometer is designed to read out analogue signal from preamplifier of gamma-ray detectors and to digitalize it using DGF/Pixie-4 software and card package (XIA LLC). This is realized by converting an Ortec Compton suppression data acquisition system into an all-digital spectrometer. Instead of using its timing electronic chain to determine the coincidence event, the analog signals from primary and guard detectors were connected directly into the Pixie-4 card for pulse height and time coincident measurement by individually logging and time stamping each electronic pulse. The data acquired in list-mode included coincidence and anticoincidence events consisting of records of energy and timestamp from primary and guard detectors. Every event was stored in a text file for offline processing and spectral reconstruction. A sophisticated computer simulation was also created with the goals of obtaining a better understanding of the experimental results and calculating efficiency.


Digital gamma–gamma coincidence/anticoincidence counting List-mode data acquisition Compton suppressions 


  1. 1.
    Kapsimalisa R, Landsbergera S, Ahmedb YA (2009) The determination of uranium in food samples by Compton suppression epithermal neutron activation analysis. Appl Radiat Isot 67(12):2097–2099CrossRefGoogle Scholar
  2. 2.
    Landsberger S, Kapsimalis R (2009) An evaluation of Compton suppression neutron activation analysis for determination of trace elements in some geological samples. Appl Radiat Isot 67(12):2104–2109CrossRefGoogle Scholar
  3. 3.
    Nyarko BJB, Akaho EHK, Fletcher JJ, Chatt A (2008) Neutron activation analysis for Dy, Hf, Rb, Sc, Se in some Ghanaian cereals, vegetables using short-lived nuclides, Compton suppression spectrometry. Appl Radiat Isot 66(8):1067–1072CrossRefGoogle Scholar
  4. 4.
    Nicholson G, Landsberger S, Welch L, Gritzo R (2008) Characterization of a Compton suppression system, the applicability of Poisson statistics. J Radioanal Nucl Chem 276(3):577–581CrossRefGoogle Scholar
  5. 5.
    Stover T, Lamaze G (2005) Compton suppression for neutron activation analysis applications at the national institute of standards, technology (NIST). Nucl Instrum Methods Phys Res Sect B: Beam Interact Mater Atoms 241(1–4):223–227CrossRefGoogle Scholar
  6. 6.
    Nyarko BJB, Bredwa-Mensah Y, Serfor-Armah Y, Dampare SB, Akaho EHK, Osae S, Perbi A, Chatt A (2007) Investigation of trace elements in ancient pottery from Jenini, Brong Ahafo region, Ghana by INAA and Compton suppression spectrometry. Nucl Instrum Methods Phys Res Sect B: Beam Interact Mater Atoms 263(1):196–203CrossRefGoogle Scholar
  7. 7.
    Bacchi MA, Santos LGC, De Nadai Fernandes EA, Bode P, Tagliaferro FS, França EJ (2007) INAA with Compton suppression: how much can the analysis of plant materials be improved? J Radioanal Nucl Chem 271(2):345–351CrossRefGoogle Scholar
  8. 8.
    Nyarko BJB, Akaho EHK, Fletcher JJ, Zwicker B, Chatt A (2006) Simultaneous determination of short-to-medium lived nuclides in Ghanaian food items using INAA, Compton suppression counting. J Radioanal Nucl Chem 270(1):243–248CrossRefGoogle Scholar
  9. 9.
    Zhang W, Chatt A (1998) Compton suppression spectrometry coupled to instrumental neutron activation for iodine in biological materials. Trans Am Nucl Soc 78:95–96Google Scholar
  10. 10.
    Zhang W, Chatt A (2000) Determination of vanadium by instrumental neutron activation analysis in conjunction with Compton suppression gamma-ray spectrometry. Trans Am Nucl Soc 83:486–488Google Scholar
  11. 11.
    Zhang W, Chatt A (2000) Determination of copper by neutron activation analysis in conjunction with Compton suppression gamma spectrometry. Trans Am Nucl Soc 82:92–93Google Scholar
  12. 12.
    Zhang W, Chatt A (1997) Compton suppression spectrometry for arsenic in biological reference materials. Trans Am Nucl Soc 77:11–12Google Scholar
  13. 13.
    Paulus TJ, Keyser RM (1991) Compton suppression systems for environmental measurements. In: International conference on methods and applied radioanalytical chemistry (MARC-II), KonaGoogle Scholar
  14. 14.
    Hennig W, Chua YX, Tana H, Fallu-Labruyerea A, Warburtona WK, Grzywaczb R (2007) The DGF Pixie-4 spectrometer: compact digital readout electronics for HPGe clover detectors. Nucl Instrum Methods Phys Res Sect B Inter Mater Atoms 263(1):175–178CrossRefGoogle Scholar
  15. 15.
    Geant4 Collaboration, Agostinelli S et al (2003) Accelerators, spectrometers, detectors and associated equipment. Nucl Instrum Methods Phys Res A 506(3):250–303CrossRefGoogle Scholar
  16. 16.
    Vincenzo I, Lorenzo M, Andreas P (2003) Review of the abstract interfaces for data analysis (AIDA) from a developer’s perspective. CERN version1.0Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  • Weihua Zhang
    • 1
  • Pawel Mekarski
    • 1
  • Maxime Dion
    • 1
  • Jing Yi
    • 1
  • Kurt Ungar
    • 1
  1. 1.Radiation Protection BureauHealth CanadaOttawaCanada

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