Characterization of Nonlinearity Scintillation Effects in HECTOR with GEANT4*

It has been observed that NaI(Tl) detectors exhibit nonlinear behavior in light output for gamma-ray detection that varies with the total energy deposited and gamma-ray multiplicity. Understanding such changes in radiation detection can improve the energy resolution of the detector and ensure proper energy calibration. To understand such effects for the High EffiCiency TOtal absorption spectrometeR (HECTOR), GEANT4.10.5’s built-in scintillation function was used to model the scintillation of the NaI(Tl) crystals. The simulation was used to characterize the response of the detector to varying energies and multiplicities of gamma rays. Here, a comparison of the results to previously published results will be discussed in further detail.