Segregation Coefficient of Pb~(2+)Ions in CaF_2Crystals

摘要

Calcium fluoride crystals doped with various concentration of PbF2 were grown usingthe Bridgman technique. The optical absorption spectra reveal the characteristic UV absorptionbands of the divalent Lead. The concentration distribution of the Pb~(2+)-ions along of four rystalshas been investigated using the optical absorption method. From our study results that theeffective distribution coefficient of the Pb(2+)ions in CaF_2host depends on the dopantconcentration, and varies between 0.85 and 1.15.