The afterglow mechanism of chromium-doped gadolinium gallium garnet

Abstract Chromium-doped gadolinium gallium garnet (Gd 3 Ga 5 O 12 :Cr) shows an efficient IR luminescence. On X-ray excitation an afterglow occurs which is harmful for application in computed tomography. The mechanism of the suppression of the afterglow by cerium is elucidated in this paper.