Non-Proportionality Electron Response and Energy Resolution of LaBr3:Ce and LuYAP:Ce Scintillating Crystals

Abstract

The present research work focuses on a comparative study of the non-proportionality of the electron response and the electron energy resolution for LaBr3:Ce and LuYAP:Ce scintillating crystals in the energy range from 97.8 keV to 437.0 keV by using the Compton coincidence technique (CCT). The results reveal that the LaBr3:Ce crystal shows the higher yield than the LuYAP:Ce crystal. Non-proportional electron responses at 97.8 keV were 6% higher and 2% lower for the LaBr3:Ce and the LuYAP crystals, respectively. The percentage proportionality of the electron response decreases with increasing electron energy. The proportionality of the electron response has higher values at energies beyond 374.5 keV for the LaBr3:Ce crystal and 260.4 keV for the LuYAP:Ce crystal. The electron energy resolution of the LaBr3:Ce crystal is better than that of the LuYAP:Ce crystal in the energy range from 97.8 keV to 437.0 keV. However, at low electron energy the resolutions of the electron responses for both scintillating crystal show similar values. Both the LaBr3:Ce and the LuYAP scintillating crystals show electron energy resolutions proportional to 1/√E.