Impurity Cu+ centers in LiF single crystals
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LiF single crystals with copper impurity (0.0004–0.002%) have been grown by the Czochralski method and investigated. The luminescence, excitation, and optical absorption spectra have been recorded. The luminescence spectrum contains a band at 450 nm upon 250-nm excitation. This band is attributed to Cu+ centers in the samples grown. The mechanisms of capture and recombination during thermoluminescence are considered.
KeywordsLuminescence Spectrum Czochralski Method Lithium Fluoride Divalent State Copper Impurity
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