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

• Computation of coincidence summing corrections for peaks of 152Eu and 134Cs.
• The MC penEasy code has been modified to include the coincidence summing effect.
• The correction factors have been obtained with PENELOPE/penEasy MC code.
• Results have been validated using an ICRM intercomparison.

The coincidence summing correction factors estimated with penEasy, a steering program for the Monte Carlo simulation code PENELOPE, and with penEasy-eXtended, an in-house modified version of penEasy, are presented and discussed for 152Eu and 134Cs in volume sources. The geometries and experimental data were obtained from an intercomparison study organized by the International Committee for Radionuclide Metrology (ICRM). A significant improvement in the results calculated with PENELOPE/penEasy was obtained when X-rays are included in the 152Eu simulations.