High Resolution and High Contrast Imaging With Thin ${\rm SrI} _{2}$ -Scintillator Screens

The Eu²⁺ activated SrI₂ is gaining ground in spectroscopic applications, thanks to its excellent scintillation properties like high light yield and good energy resolution. The exploitation of these properties for other application fields is limited by the hygroscopic nature of the SrI₂. Single crystal scintillating screens exhibit high spatial resolution, this combined with the high density, high effective atomic number, and the high light yield of the SrI₂ could be used for high resolution X-ray imaging. In this work, the suitability of thin -screens for X-ray radiography applications was tested. First a packaging technique was developed that protected the hygroscopic screens during measurements. Our results show high resolution of the images obtained with thin -scintillator screens. With these results, we think that the SrI₂ -scinitillator is not only a candidate for spectroscopic applications, but also for high resolution X-ray imaging applications.