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Nature of the luminescence centers in ionic crystals
Czechoslovak Journal of Physics, 1970The main attention is paid to the following questions: 1. The possible models of the luminescence centers in activated alkali halide crystals, 2. the experimental evidence of the presence of various types of the luminescence centers, 3. the nature of the excitations of the simplest luminescence centers in alkali halides activated by mercury-like ions ...
Ch. Lushchik +3 more
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Lattice Vibrations in Crystals with Molecular Impurity Centers
Physical Review, 1963The Green's function formalism of Lifshitz and others for the calculation of lattice vibrations in impure crystals is restricted to disturbed lattices with an unchanged number of particles (monatomic impurity centers). A method is given here which reduces the problem of polyatomic impurities to the Lifshitz formalism.
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Colour centers in synthetic fluorite crystals
Physica, 1958Synopsis A study of the coloration of fluorite crystals after irradiation and additive coloration has been made. Bleaching experiments and lattice parameter measurement lead us to probable models for the α and β centers. The β center should be a normal F-center, the α center an F-center coupled to an interstitial fluorine ion.
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On A-centers in Colored KCl Crystals
Journal of the Physical Society of Japan, 1960Hiroshi Ohkumura, Katsunobu Awane
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Thermodynamic analysis and purifying an amorphous phase of frozen crystallization centers
Russian Journal of Physical Chemistry A, 2017Tatiana Tsaregradskaya
exaly