Nonproportionality and Scintillation Studies of ${\hbox{Eu:}} {\hbox{SrI}}_{\rm 2}$  From 295 to 5 K
The low temperature scintillation properties of 5 atomic % Eu:SrI2 from ambient temperature down to 5 K were studied for the first time. With decreasing temperature, a shift in emission wavelength and a shortening of decay time were observed. Light yield and energy resolution exhibited notable changes with temperature, and were maximized as temperature was decreased. A degradation of light yield proportionality with decreasing temperature was observed.