Radiation induced defects in ${\mathrm{Pb}}^{2+}$-doped LiF crystals

Abstract

The influence of Pb²⁺ doping on the optical properties of LiF crystals before and after irradiation with X-ray was studied by using optical absorption and photoluminescence measurements. After irradiation it was observed an increase of the absorption due to primary and aggregate electronic defects together with a higher photoluminescence signals associated with the F₂ and F₃⁺ colour centres in doped samples compared with the undoped ones.