Selecting Luminophore-Bearing Modifying Agents to Adjust Spectral Characteristics of Diamonds
V. A. Chanturia, V. V. Morozov, G. P. Dvoichenkova, E. L. Chanturia, O. E. Koval’chuk, Yu. A. Podkamennyi
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources-IPKON, Russian Academy of Sciences, Moscow, Russia
Keywords: diamonds, X-ray fluorescent separation, luminophores, composition, kinetics and spectral characteristics, modification
Abstract
The modification procedure for the kinetics and spectral characteristics of fluorescent diamonds using luminophores ensures the simultaneous increase in the amplitudes of the long- and short-persistent luminescence signals at a preset ratio (1:1). Abnormally and weakly fluorescent diamonds after luminophore modification have elevated amplitudes of the kinetics and spectral characteristics, and are identifiable as natural crystals with the required luminescence intensity. This approach allows the simultaneous increase of the collapse and the decay constant of X-ray luminescence signal. As a result, abnormally and weakly fluorescent diamonds acquire higher values of these characteristics, become detectable as natural diamonds and are recoverable in X-ray fluorescent separation.
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