Calcium fluoride crystals doped with various concentrations of PbF_{2} have been grown using the Bridgman technique. The optical absorption spectra reveal the characteristic UV absorption bands of the Pb^{2+} ions. The distribution of the Pb^{2+}-ions along four crystals has been investigated using the optical absorption method. Taking into account the relationship between the optical absorption coefficient and the concentration of the impurities in the samples, the effective segregation coefficient of the Pb^{2+} ions has been calculated. Our study shows that the effective segregation coefficient of the Pb^{2+} ions in CaF_{2} host depends on the dopant concentration, and varies between 0.85 and 1.15, for 0.5 mol%PbF_{2} and 3 mol%PbF_{2}-doped CaF_{2}, respectively.
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