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True coincidence summing corrections in point and extended sources

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Abstract

The true coincidence summing (TCS) effect on the full energy peak (FEP) efficiency calibration of an HPGe detector has been studied as a function of sample-to-detector distance using multi-gamma sources. Analytical method has been used to calculate coincidence correction factors for 152Eu, 133Ba, 134Cs and 60Co for point and extended source geometry at close sample-to-detector distance. Peak and total efficiencies required for this method have been obtained by using MCNP code by using the optimized detector geometry. The correction factors have also been obtained experimentally. The analytical and the experimental correction factors have been found to match within 1–5%. The method has been applied to obtain the activity of the radionuclides (106Ru, 125Sb, 134Cs and 144Ce) present in a fission product sample.

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Authors and Affiliations

  1. Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    Chhavi Agarwal, Sanhita Chaudhury & A. Goswami

  2. Reactor Projects Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    M. Gathibandhe

Authors
  1. Chhavi Agarwal
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  2. Sanhita Chaudhury
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  3. A. Goswami
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  4. M. Gathibandhe
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Correspondence to A. Goswami.

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Agarwal, C., Chaudhury, S., Goswami, A. et al. True coincidence summing corrections in point and extended sources. J Radioanal Nucl Chem 289, 773–780 (2011). https://doi.org/10.1007/s10967-011-1126-7

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  • DOI: https://doi.org/10.1007/s10967-011-1126-7

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