Eu:SrI2

Europium doped Strontium Iodide scintillation crystals are high resolution, low background crystals due to their extreme good proportionality and very high light output. The scintillator is relatively slow with a decay time of several microseconds. They are considered prospective materials for spectro-surveymeter systems because of their high light output (over 80,000 photons/MeV) and an energy resolution value of ~3% at 662 keV1–6.

SrI2 (SrI₂:Eu): Strontium Iodide scintillators enable high resolution gamma-ray spectroscopy because of the high light output and exceptional linearity of the material. 

With the application of nuclear safety inspection technology in anti-terrorism and the continuous development of nuclear medical imaging, the requirements for light output and energy resolution of scintillation crystals are continuously improved. Security applications and nuclear non-proliferation depend on the rapid identification of highly enriched uranium, radioactive sources and other special nuclear materials. Halide crystals have been widely used as high-energy physics, nuclear medicine, safety inspection and address exploration as radiation materials since their invention in 1948. Eu:SrI₂ is expected to become a new generation of gamma scintillator due to its high light output, good energy resolution and high effective atomic number.