CsI(Na) micron-scale particles-based composite material for fast pulsed X-ray detection

摘要

We report a method for the preparation of fast scintillation composite material based on CsI(Na) micron-scale particles. The composite material was prepared by solidifying CsI(Na) micron-scale particles in an epoxy resin adhesive. The scintillation properties under X-ray excitation were investigated. The luminescence time characteristic of the CsI(Na) composite material is significantly improved, with the fall time range of 15.6-19.6 ns, over 20 times faster than that of bulk single crystal CsI(Na). Furthermore, the deliquescence property of CsI(Na) is overcome. The luminescence spectra show that the Na-related luminescence and self-trapped excitons luminescence of the composite material are strongly concentration-dependent. This kind of composite material could be a promising scintillator used in fast pulse X-ray detection.