LUMINESCENT MATERIAL COMPRISING A DOPED RARE EARTH SILICATE

摘要

The invention relates to a material comprising a rare earth (Ln) silicate doped with an element B different from Ln, B being chosen among Ce, Pr, Tb, wherein B is at least partially in its 4+ oxidation state (B4+), the quantity of B4+ in said material being comprised between 0.0001 % and 0.1 % in mass. This material may be a scintillating material and may present an afterglow of generally less than 200 ppm after 100 ms relative to the intensity measured during an X-ray irradiation. It is preferably codoped. It may be obtained using an oxidizing annealing. It is particularly suited to integration in an ionizing particle detector that may be used in a medical imaging apparatus.