Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software

Mohamed S. Badawi, Slobodan I. Jovanovic, Abouzeid A. Thabet, Ahmed M. El-Khatib, Aleksandar D. Dlabac, Bohaysa A. Salem, Mona M. Gouda, Nikola N. Mihaljevic, Kholud S. Almugren, Mahmoud I. Abbas

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Abstract

The 4π NaI(Tl) γ-ray detectors are consisted of the well cavity with cylindrical cross section, and the enclosing geometry of measurements with large detection angle. This leads to exceptionally high efficiency level and a significant coincidence summing effect, much more than a single cylindrical or coaxial detector especially in very low activity measurements. In the present work, the detection effective solid angle in addition to both full-energy peak and total efficiencies of well-type detectors, were mainly calculated by the new numerical simulation method (NSM) and ANGLE4 software. To obtain the coincidence summing correction factors through the previously mentioned methods, the simulation of the coincident emission of photons was modeled mathematically, based on the analytical equations and complex integrations over the radioactive volumetric sources including the self-attenuation factor. The measured full-energy peak efficiencies and correction factors were done by using 152Eu, where an exact adjustment is required for the detector efficiency curve, because neglecting the coincidence summing effect can make the results inconsistent with the whole. These phenomena, in general due to the efficiency calibration process and the coincidence summing corrections, appear jointly. The full-energy peak and the total efficiencies from the two methods typically agree with discrepancy 10%. The discrepancy between the simulation, ANGLE4 and measured full-energy peak after corrections for the coincidence summing effect was on the average, while not exceeding 14%. Therefore, this technique can be easily applied in establishing the efficiency calibration curves of well-type detectors.

Original languageEnglish
Article number035005
JournalAIP Advances
Volume7
Issue number3
DOIs
Publication statusPublished - 1 Mar 2017

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computer programs
detectors
energy
simulation
curves
rays
attenuation
adjusting
cavities
cross sections
photons
geometry

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Badawi, M. S., Jovanovic, S. I., Thabet, A. A., El-Khatib, A. M., Dlabac, A. D., Salem, B. A., ... Abbas, M. I. (2017). Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software. AIP Advances, 7(3), [035005]. https://doi.org/10.1063/1.4978214
Badawi, Mohamed S. ; Jovanovic, Slobodan I. ; Thabet, Abouzeid A. ; El-Khatib, Ahmed M. ; Dlabac, Aleksandar D. ; Salem, Bohaysa A. ; Gouda, Mona M. ; Mihaljevic, Nikola N. ; Almugren, Kholud S. ; Abbas, Mahmoud I. / Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software. In: AIP Advances. 2017 ; Vol. 7, No. 3.
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title = "Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software",
abstract = "The 4π NaI(Tl) γ-ray detectors are consisted of the well cavity with cylindrical cross section, and the enclosing geometry of measurements with large detection angle. This leads to exceptionally high efficiency level and a significant coincidence summing effect, much more than a single cylindrical or coaxial detector especially in very low activity measurements. In the present work, the detection effective solid angle in addition to both full-energy peak and total efficiencies of well-type detectors, were mainly calculated by the new numerical simulation method (NSM) and ANGLE4 software. To obtain the coincidence summing correction factors through the previously mentioned methods, the simulation of the coincident emission of photons was modeled mathematically, based on the analytical equations and complex integrations over the radioactive volumetric sources including the self-attenuation factor. The measured full-energy peak efficiencies and correction factors were done by using 152Eu, where an exact adjustment is required for the detector efficiency curve, because neglecting the coincidence summing effect can make the results inconsistent with the whole. These phenomena, in general due to the efficiency calibration process and the coincidence summing corrections, appear jointly. The full-energy peak and the total efficiencies from the two methods typically agree with discrepancy 10{\%}. The discrepancy between the simulation, ANGLE4 and measured full-energy peak after corrections for the coincidence summing effect was on the average, while not exceeding 14{\%}. Therefore, this technique can be easily applied in establishing the efficiency calibration curves of well-type detectors.",
author = "Badawi, {Mohamed S.} and Jovanovic, {Slobodan I.} and Thabet, {Abouzeid A.} and El-Khatib, {Ahmed M.} and Dlabac, {Aleksandar D.} and Salem, {Bohaysa A.} and Gouda, {Mona M.} and Mihaljevic, {Nikola N.} and Almugren, {Kholud S.} and Abbas, {Mahmoud I.}",
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Badawi, MS, Jovanovic, SI, Thabet, AA, El-Khatib, AM, Dlabac, AD, Salem, BA, Gouda, MM, Mihaljevic, NN, Almugren, KS & Abbas, MI 2017, 'Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software', AIP Advances, vol. 7, no. 3, 035005. https://doi.org/10.1063/1.4978214

Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software. / Badawi, Mohamed S.; Jovanovic, Slobodan I.; Thabet, Abouzeid A.; El-Khatib, Ahmed M.; Dlabac, Aleksandar D.; Salem, Bohaysa A.; Gouda, Mona M.; Mihaljevic, Nikola N.; Almugren, Kholud S.; Abbas, Mahmoud I.

In: AIP Advances, Vol. 7, No. 3, 035005, 01.03.2017.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Calibration of 4π NaI(Tl) detectors with coincidence summing correction using new numerical procedure and ANGLE4 software

AU - Badawi, Mohamed S.

AU - Jovanovic, Slobodan I.

AU - Thabet, Abouzeid A.

AU - El-Khatib, Ahmed M.

AU - Dlabac, Aleksandar D.

AU - Salem, Bohaysa A.

AU - Gouda, Mona M.

AU - Mihaljevic, Nikola N.

AU - Almugren, Kholud S.

AU - Abbas, Mahmoud I.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The 4π NaI(Tl) γ-ray detectors are consisted of the well cavity with cylindrical cross section, and the enclosing geometry of measurements with large detection angle. This leads to exceptionally high efficiency level and a significant coincidence summing effect, much more than a single cylindrical or coaxial detector especially in very low activity measurements. In the present work, the detection effective solid angle in addition to both full-energy peak and total efficiencies of well-type detectors, were mainly calculated by the new numerical simulation method (NSM) and ANGLE4 software. To obtain the coincidence summing correction factors through the previously mentioned methods, the simulation of the coincident emission of photons was modeled mathematically, based on the analytical equations and complex integrations over the radioactive volumetric sources including the self-attenuation factor. The measured full-energy peak efficiencies and correction factors were done by using 152Eu, where an exact adjustment is required for the detector efficiency curve, because neglecting the coincidence summing effect can make the results inconsistent with the whole. These phenomena, in general due to the efficiency calibration process and the coincidence summing corrections, appear jointly. The full-energy peak and the total efficiencies from the two methods typically agree with discrepancy 10%. The discrepancy between the simulation, ANGLE4 and measured full-energy peak after corrections for the coincidence summing effect was on the average, while not exceeding 14%. Therefore, this technique can be easily applied in establishing the efficiency calibration curves of well-type detectors.

AB - The 4π NaI(Tl) γ-ray detectors are consisted of the well cavity with cylindrical cross section, and the enclosing geometry of measurements with large detection angle. This leads to exceptionally high efficiency level and a significant coincidence summing effect, much more than a single cylindrical or coaxial detector especially in very low activity measurements. In the present work, the detection effective solid angle in addition to both full-energy peak and total efficiencies of well-type detectors, were mainly calculated by the new numerical simulation method (NSM) and ANGLE4 software. To obtain the coincidence summing correction factors through the previously mentioned methods, the simulation of the coincident emission of photons was modeled mathematically, based on the analytical equations and complex integrations over the radioactive volumetric sources including the self-attenuation factor. The measured full-energy peak efficiencies and correction factors were done by using 152Eu, where an exact adjustment is required for the detector efficiency curve, because neglecting the coincidence summing effect can make the results inconsistent with the whole. These phenomena, in general due to the efficiency calibration process and the coincidence summing corrections, appear jointly. The full-energy peak and the total efficiencies from the two methods typically agree with discrepancy 10%. The discrepancy between the simulation, ANGLE4 and measured full-energy peak after corrections for the coincidence summing effect was on the average, while not exceeding 14%. Therefore, this technique can be easily applied in establishing the efficiency calibration curves of well-type detectors.

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U2 - 10.1063/1.4978214

DO - 10.1063/1.4978214

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JO - AIP Advances

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