Ultraviolet Absorption Bands of Thallous Ions in Potassium Dihydrogen Phosphate Crystals
1978 年 44 巻 1 号 p. 275-281
詳細
1978 年 44 巻 1 号 p. 275-281
Optical absorption bands induced by doping thallous ions in KDP single crystals are found at 5.56, 5.76, 6.91, 7.30, and 7.67 eV. They exhibit clear dependence on the polarization of light, reflecting the local symmetry of the impurity centers. Comparison is made between the observed bands in KDP and those in alkali halide crystals. The spectra are interpreted in terms of spin-orbit interaction in the thallium ions and the crystal field due to surrounding ions. Effect of lattice vibrations is also discussed with respect to the intensity and the structure of the absorption bands.
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