Nonproportionality of Scintillator Detectors. III. Temperature Dependence Studies

This paper is the third in a series of articles on the basic physics of nonproportionality in scintillators. Here, we focus on the temperature dependence of six scintillators, NaI(Tl), CsI(Tl), CsI(Na), CeBr₃, LaBr₃(Ce), and undoped SrI₂, and report their nonproportionality curves at -40^°C, 0^°C and + 40^°C. We fit the data to a modified form of our previously employed model, including the competition of carrier trapping with the Onsager-mediated attraction between electrons and holes.