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Nemes T, Mrda D, Bikit I, et al. An improved formula for determination of the activity via the sum-peak method. Appl Radiat Isot. 2016;114:173-8doi: 10.1016/j.apradiso.2016.05.011.
Nemes, T., Mrda, D., Bikit, I., & Grujic, S. (2016). An improved formula for determination of the activity via the sum-peak method. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 114173-8. https://doi.org/10.1016/j.apradiso.2016.05.011
Nemes, T, et al. "An improved formula for determination of the activity via the sum-peak method." Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine vol. 114 (2016): 173-8. doi: https://doi.org/10.1016/j.apradiso.2016.05.011
Nemes T, Mrda D, Bikit I, Grujic S. An improved formula for determination of the activity via the sum-peak method. Appl Radiat Isot. 2016 Aug;114:173-8. doi: 10.1016/j.apradiso.2016.05.011. Epub 2016 May 13. PMID: 27236834.
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Appl Radiat Isot. 2016 Aug;114:173-8. doi: 10.1016/j.apradiso.2016.05.011. Epub 2016 May 13.

An improved formula for determination of the activity via the sum-peak method.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

T Nemes, D Mrda, I Bikit, S Grujic

Affiliations

  1. Faculty of Technical Sciences, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia. Electronic address: [email protected].
  2. Faculty of Sciences, Department of Physics, Trg Dositeja Obradovica 4, 21000 Novi Sad, Serbia.
  3. Faculty of Technical Sciences, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia.

PMID: 27236834 DOI: 10.1016/j.apradiso.2016.05.011

Abstract

The sum-peak method principally enables determination of the absolute activity of gamma cascade emitting sources based only on the use of spectral data, without knowledge of the detector efficiencies. However, to achieve better accuracy of the activity results, corrections due to pile-up, accidental coincidences, electronic noise and angular correlations must be introduced into the proposed method. Such corrections usually require the collection of a few gamma spectra and additional extrapolations, thereby further complicating the experimental procedures. In this paper, it is shown that by using pile-up peaks for corrections of accidental coincidences, Monte Carlo techniques for angular correlation, and LLD corrections, the source activity can be measured with accuracy and reproducibility below 1% using only one gamma spectrum, without any additional extrapolations.

Copyright © 2016 Elsevier Ltd. All rights reserved.

Keywords: Absolute activity; Angular correlations; Coincidence; Gamma spectrometry; Monte Carlo; Sum peak

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