Distribution of Pb^{2+} Ions in PbF_{2}-Doped CaF_{2} Crystals

• Authors: M. Paraschiva , I. Nicoara , M. Stef , O. Bunoiu
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

42.70.Hj; 68.35.Dv; 78.20.Ci; 78.40.Ha; 81.10.Fq

Discipline

• 42.70.Hj: Laser materials
• 78.40.Ha: Other nonmetallic inorganics
• 81.10.Fq: Growth from melts; zone melting and refining
• 78.20.Ci: Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
• 68.35.Dv: Composition, segregation; defects and impurities

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 3
• Pages: 466-470

Dates

published

2010-03

received

2009-05-11

Contributors

author

M. Paraschiva

• Department of Physics, West University of Timisoara, Bd. V. Parvan 4, Timisoara 300223, Romania

author

I. Nicoara

• Department of Physics, West University of Timisoara, Bd. V. Parvan 4, Timisoara 300223, Romania

author

M. Stef

• Department of Physics, West University of Timisoara, Bd. V. Parvan 4, Timisoara 300223, Romania

author

O. Bunoiu

• Department of Physics, West University of Timisoara, Bd. V. Parvan 4, Timisoara 300223, Romania

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Identifiers

DOI

10.12693/APhysPolA.117.466