Monte Carlo simulation method for determination of true coincidence summing correction factors for Cs-134 atom

Gamma-ray spectroscopy plays a crucial role in various scientific disciplines, from studying the structure of nuclei to environmental radioactivity measurements and medical imaging. However, the accurate analysis of decay information through gamma-ray spectroscopy can be adversely affected by an event known as true coincidence summing (TCS). TCS occurs when two or more gamma rays, emitted individually from one or more radioactive nuclei, hit the detector crystal within a time interval shorter than the detector's time resolution, depositing their energies there. Instead of observing separate peaks for each gamma ray, a single peak is observed, giving rise to the phenomenon of TCS. To accurately obtain the efficiency curve, TCS correction factors must be generated, and the efficiency for each energy value should be multiplied by these correction factors. Both experimental and computational methods can be employed to obtain these correction factors, with the Monte Carlo (MC) simulation method being one of the computational approaches. In this study, a method has been developed for obtaining TCS correction factors through MC simulation for the radioactive Cs-134 nucleus.