Gadolinium Oxysulfide is a semiconductor with a variety of technological applications. This compound has remarkable properties due to the fine balance between “iconicity” and “covalency” of Gd-O and Gd-S bonds. One of the most popular applications for this compound is as a detector for ionizing radiation—it acts as an x-ray phosphor / scintillator material.
Lorad’s efficient new process for producing Terbium doped Gadolinium Oxysulfide powder for use in x- ray imaging detectors (intensifying screens) is more efficient for high x-ray tube voltage applications such as abdominal imaging, chest radiography, lumbar spine radiography, and computerized axial tomography (CAT) scans as well as very low voltage applications such as mammography. Color coordinates of the powder are: X = 0.34 and Y = 0.57.
Below is a graph of the excitation and emission spectra of Terbium doped Gadolinium Oxysulfide:
Low voltage application emission spectrum
High voltage application emission spectrum
Chromacity Diagram
Gadolinium Oxysulfide is available in small research quantities and for multi-kilogram commercial applications and may be doped with Terbium, Praseodymium, Dysprosium, or a Dysprosium-Terbium mixture.