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A semi-empirical method for calculation of true coincidence corrections for the case of a close-in detection in γ-ray spectrometry

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Abstract

In this paper, a semi-empirical method is proposed to determine true coincidence-summing (TCS) correction factors for high resolution γ-ray spectrometry. It needs the knowledge of both full energy peak (FEP) efficiency and total-to-peak (TTP) efficiency curves. The TTP efficiency curve is established from the measurements with a set of coincidence-free point sources. Whereas for a volume source, the coincidence-free FEP efficiency curve is obtained iteratively by using the peaks from almost the coincidence-free nuclides and those from the coincident nuclides in the mixed standard sources. Then the fitting parameters obtained for both TTP and FEP efficiency curves are combined in a freely-available TCS calculation program called TrueCoinc, which yields the TCS correction factors required for any nuclide. As an application, the TCS correction factors were determined for the particular peaks of 238U, 226Ra and 232Th in the reference materials, measured in the case of a close-in detection geometry using a well-type Ge detector. The present TCS correction method can be applied without difficulty to all Ge detectors for any coincident nuclide.

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Acknowledgements

This work was supported by AU-INS within the framework of the project No. DPT 2005K-120130 under the cooperation between AU and TAEA. Authors are grateful to Dr. S. SUDÁR from Institute of Experimental Physics, Kossuth University, Debrecen, Hungary, for his permission to use TrueCoinc program. We also express our sincere gratitude to Prof. Dr. H. Y. GÖKSU from AU-INS for her useful comments.

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  1. H. Yücel

    Present address: Institute of Nuclear Sciences of Ankara University (AU-INS), Tandogan, 06100, Ankara, Turkey

Authors and Affiliations

  1. Turkish Atomic Energy Authority (TAEA), Besevler Yerleskesi, Tandogan, 06100, Ankara, Turkey

    H. Yücel

  2. Institute of Nuclear Sciences of Ankara University (AU-INS), Tandogan, 06100, Ankara, Turkey

    A. N. Solmaz, E. Köse & D. Bor

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  1. H. Yücel
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  2. A. N. Solmaz
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  3. E. Köse
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  4. D. Bor
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Correspondence to H. Yücel.

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Yücel, H., Solmaz, A.N., Köse, E. et al. A semi-empirical method for calculation of true coincidence corrections for the case of a close-in detection in γ-ray spectrometry. J Radioanal Nucl Chem 283, 305–312 (2010). https://doi.org/10.1007/s10967-009-0360-8

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  • DOI: https://doi.org/10.1007/s10967-009-0360-8

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