| Popis: |
In the last decades, fluorites crystals (MeF2, Me = Ca, Ba, Sr, Pb) doped with trivalent rare-earth ions (RE3+) have attracted attention of research community due to their various applications such as: lasers, quantum electronics, scintilators or photosensors in PET (positron-emission-tomography) scanner. The goal of this work is to investigate the spectoscopic properties of gamma irradiated BaF2:CeF3 crystal. In order to investigate the quality of the as-grown crystal the dislocation density was estimated. The dislocation density is around 1.3×105 disloc./cm2. After irradiation with gamma rays, the absorption spectra reveal the appearance of a new absorption band in the 400-600nm region. The induced absorption bands depend on the gamma rays dose and the peaks intensities increase with the dose of radiation.In the last decades, fluorites crystals (MeF2, Me = Ca, Ba, Sr, Pb) doped with trivalent rare-earth ions (RE3+) have attracted attention of research community due to their various applications such as: lasers, quantum electronics, scintilators or photosensors in PET (positron-emission-tomography) scanner. The goal of this work is to investigate the spectoscopic properties of gamma irradiated BaF2:CeF3 crystal. In order to investigate the quality of the as-grown crystal the dislocation density was estimated. The dislocation density is around 1.3×105 disloc./cm2. After irradiation with gamma rays, the absorption spectra reveal the appearance of a new absorption band in the 400-600nm region. The induced absorption bands depend on the gamma rays dose and the peaks intensities increase with the dose of radiation. |
