Abstract
Geant4 simulation was applied to correct the coincidence summing (CS) effect in detecting a volumetric gamma-ray sources, and this technique was applied to a(152)Eu standard sources. The radioactive sources were a liquid cylindrical, rectangular, and Marinelli beaker shapes of different volume for each one. Radionuclide track (RT) including coincidence summing and monoenergetic track without coincidence summing. The results obtained from two approaches compared with the experimental data and the modified KORSUM code for cylindrical gamma-ray source. The comparison showed that the adopted method in this investigation is useful for coincidence summing corrections for a voluminous gamma-ray sources.Moreover, this technique requires far less computation time than the techniques that depend on the calculation of total efficiency.