Calculation of true coincidence summing correction factor for a Broad Energy Germanium (BEGe) detector using standard and fabricated sources

TL;DR

This study calculates the true coincidence summing correction factor for a BEGe detector using experimental, analytical, and Monte Carlo simulation methods with standard and fabricated sources, achieving good agreement among methods.

Contribution

It introduces a combined experimental, analytical, and simulation approach to accurately determine TCS correction factors for BEGe detectors with various sources.

Findings

Analytical and experimental correction factors agree well.

Monte Carlo simulations effectively match experimental efficiencies.

Correction factors vary with geometry and source type.

Abstract

The true coincidence summing (TCS) correction factor for a Broad Energy Germanium (BEGe) detector has been calculated at far and close geometry measurement using multi-energetic radioactive $\gamma$-ray sources $^{60}$Co, $^{133}$Ba and $^{152}$Eu. The correction factors were calculated using experimental method and analytical method. Photopeak efficiency and total efficiency required to calculate the correction factor were obtained using Geant4 Monte Carlo simulation code. A few standard as well as fabricated mono-energetic sources were also included in the $\gamma$-ray efficiency measurements. The simulated efficiencies of mono-energetic $\gamma$-ray sources were matched to experimental $\gamma$-ray efficiencies by optimizing the detector parameters. The same parameters were used to obtain the photopeak and total efficiency for $\gamma$-ray of our interest and coincident $\gamma$-ray. Analytical correction factors and experimental correction factors were found in good agreement with each other.