CsI(Tl) Scintillator

Cesium Iodide doped with Thallium (CsI:Tl) is a widely used inorganic scintillation crystal. Boasting a density of 4.51 g/cm³ and a light yield reaching 45% of NaI:Tl, it features an emission peak at 550 nm that matches well with silicon photodiodes. With low afterglow, excellent radiation hardness and non-cleavable structure, it serves as a key component in security screening, high-energy physics experiments and industrial non-destructive testing.

OST Photonics provides customized solutions for CsI(Tl) scintillation products, including bulk crystals, scintillation screens, as well as linear and 2D arrays, tailored to meet specific customer requirements. We also offer low-afterglow CsI(Tl) crystals with an afterglow range of 0.05% to 0.39% measured at 20ms. These specialized crystals preserve the high light yield characteristic of standard CsI(Tl) variants while drastically suppressing afterglow effects. This effectively eliminates image trailing caused by afterglow in scanning radiation imaging systems, significantly enhancing imaging clarity and resolution. As such, they are ideally suited for high-performance imaging applications demanding superior image quality and rapid scanning capabilities.