Recently SrI2, a scintillator patented by Hofstadter in 1968, has been rediscovered and shown to possess remarkable
scintillation properties. The light output of SrI2:Eu2+ has been measured to be even higher than previously observed and
exceeds 120,000 photons/MeV, making it one of the brightest scintillators in existence. The crystal also has excellent
energy resolution of less than 3% at 662 keV. The response is highly linear over a wide range of gamma ray energies.
The emission of SrI2:Eu2+ and SrI2:Ce3+/Na+ is well-matched to both photomultiplier tubes and blue-enhanced silicon
photodiodes. While SrI2:Eu2+ is relatively slow, SrI2:Ce3+/Na+ has a fast response. SrI2 crystals with many different
dopant concentrations have been grown and characterized. In this presentation, crystal growth techniques as well as the
effects of dopant concentration on the scintillation properties of SrI2, over the range 0.5% to 8% Eu2+ and 0.5% to 2%
Ce3+/Na+, will be discussed in detail.
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