BaWF8 Crystals – Efficient X-Ray Luminophores

Resumo

The spectral-kinetic characteristics of cerium- and chromium-doped samples of BaWF₈ synthesized by the hydrothermal method were investigated. A luminescence band peaking at 490 nm with half-width 150 nm was found. It is shown that in the terms of the conventional luminophore NaI(Tl) the integral light yield of the x-ray luminescence equals 32% for BaWF₈ crystals and 36.5% for BaWF₈:2%CrF₃. No afterglow of the experimental crystals is observed 20 msec after irradiation stops. Analysis shows that undoped and doped BaWF₈ crystals synthesized by the hydrothermal method are promising materials for x-ray tomography.