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Coincidence summing corrections for volume samples using the PENELOPE/penEasy Monte Carlo code.

A Vargas1, A Camp1, I Serrano1

  • 1Institute of Energy Technologies (INTE)-Technical University of Catalonia (UPC), Av. Diagonal 647, 08028 Barcelona, Spain.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|December 12, 2013
PubMed
Summary

Monte Carlo simulations using PENELOPE/penEasy improved accuracy for coincidence summing corrections in volume sources. Including X-rays in simulations for Europium-152 significantly enhanced results.

Keywords:
Coincidence summingGamma-ray spectrometryMonte-Carlo simulationVolume sourcesX-rays

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Area of Science:

  • Nuclear Physics
  • Radiological Physics
  • Computational Physics

Background:

  • Accurate radionuclide metrology is crucial for various applications.
  • Coincidence summing effects in volume sources can lead to significant underestimation of activity if not corrected.
  • Monte Carlo simulations are powerful tools for modeling radiation transport and detector response.

Purpose of the Study:

  • To evaluate coincidence summing correction factors using PENELOPE/penEasy and its modified version, penEasy-eXtended.
  • To compare simulation results with experimental data from an International Committee for Radionuclide Metrology (ICRM) intercomparison.
  • To assess the impact of including X-rays in simulations for specific radionuclides.

Main Methods:

  • Utilized the Monte Carlo simulation code PENELOPE with its steering program penEasy.
  • Employed an in-house modified version, penEasy-eXtended, for enhanced simulation capabilities.
  • Simulated volume sources of (152)Eu and (134)Cs, incorporating geometries and experimental data from an ICRM study.

Main Results:

  • Coincidence summing correction factors were calculated for (152)Eu and (134)Cs in volume sources.
  • A notable improvement in simulation accuracy was achieved for (152)Eu when X-rays were included in the PENELOPE/penEasy calculations.
  • The study provides validated correction factors based on intercomparison data.

Conclusions:

  • PENELOPE/penEasy is a reliable tool for estimating coincidence summing corrections in volume sources.
  • The inclusion of X-rays in Monte Carlo simulations is essential for accurate results, particularly for radionuclides like (152)Eu.
  • The findings contribute to improved radionuclide activity measurements and metrology standards.