Spectroscopic Properties of Pb2+-Doped BaF2 Crystals

Various concentrations of PbF2-doped BaF2 crystals were grown by the Bridgman method using a shaped graphite heater. The room temperature optical absorption spectra showed two UV absorption bands (labeled A and D), characteristic of the Pb2+ ions. The structure of the bands was analyzed using the Gaussian multi-peak fitting. The distribution of the Pb2+ ions along the crystals and the effective segregation coefficient were studied using the optical absorption method. The obtained effective segregation coefficient was >1. The Pb2+ ions were not uniformly distributed along the samples. High intensity emission bands were observed in the near UV domain and the visible region.

Automated summary

Various concentrations of PbF2-doped BaF2 crystals were grown using the Bridgman method with a shaped graphite heater. The optical absorption spectra at room temperature exhibited two UV absorption bands (called A and D) associated with Pb2+ ions. The band structure was analyzed using Gaussian multi-peak fitting. The optical absorption method was used to study the distribution of Pb2+ ions and the effective segregation coefficient, which was found to be >1. Non-uniform distribution of Pb2+ ions was observed, accompanied by intense emission bands in the near UV and visible regions.