Abstract
Coincidence Summing Correction for Cylinder and Marinelli Beaker Sources by Monte Carlo Simulation
Highlights
Coincidence summing effects arises when two or more γ-rays are emitted in a cascade from an excited nucleus and are detected within the resolving time of the detector
The aim of this paper is to develop a simplest and modest method in Geant4 for the coincidence summing correction factors (CSFsimu) of the extended sources
A new method was used in GEANT4 to calculate the coincidence summing correction factors from the peak and total efficiencies and obtained accurate results for 60Co, 88Y, 133Ba and 152Eu, the average discrepancies between the experimental and simulated results were less than 1%
Summary
Coincidence summing effects arises when two or more γ-rays are emitted in a cascade from an excited nucleus and are detected within the resolving time of the detector. Z Wang, et al [10] used the Monte Carlo code MCNP and simulated the total efficiencies for the correction of coincidence summing effect They used point source to test the coincidence summing correction method and observed a coincidence peak efficiency of at small source-detector distances. Such analysis is difficult to achieve for the close geometry measurements and large volume samples because in volumetric sources the contribution of the scattered γ-rays to the total efficiency cannot be neglected [11]. The CSFsimu values were compared with the calculated and experimental results reported by Wang, et al [4] and obtained good agreements
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