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Spectral and kinetic parameters of PbX2 (X=F, Cl, Br, I) crystals emission are investigated under pulse photo- (∆t=l.0 ns) and X-ray (∆t=l.5 ns) excitation in the temperature region from 77 to 293 K. X-ray luminescence of the PbF2, PbC12 and PbBr2 crystals is considered as radiative decay of the self-trapped excitons at the defects, while subnanosecund and nanosecond emission components are regarded to the result of the thermal quenching. The nature of the fast X-ray luminescence for PbI2 crystals is discussed from the viewpoint of the possibility for observation of radiative core-valence transition.

Study of optical properties and radiation damages of Cerium Fluoride crystals doped with Ca, Ba, Sr, La, Nd, Zr and Hf in the wide range of concentrations has been performed withthe goal to obtain high optical transparency of crystals at different cumulative doses under γ-irradiation. Time decay curves and relative light yields of scintillators asa function of doping level were measured using X-ray excitation of samples and single photon counting method.

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Luminescence Parameters of PBX2 (X=F, CI, Br, I) Crystals

Optical Properties and Radiation Damages of Cerium Fluoride Crystals Doped with Alkali-Earth and Rare-Earth Elements.

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Luminescence Parameters of PBX2 (X=F, CI, Br, I) Crystals

Optical Properties and Radiation Damages of Cerium Fluoride Crystals Doped with Alkali-Earth and Rare-Earth Elements.