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Current issue   Ukr. J. Phys. 2016, Vol. 61, N 1, p.3-11
https://doi.org/10.15407/ujpe61.01.0003    Paper

Degoda V.Ya., Moroz I.M.

Taras Shevchenko National University of Kyiv, Faculty of Physics (4, Academician Glushkov Ave., Kyiv 01601, Ukraine; e-mail: inna.moroz1990@gmail.com)

Kinetic Model for Spatial Distribution of Electron Excitations in Liquid Phosphors

Section: Atoms and Molecules
Original Author's Text: Ukrainian

Abstract: A model of luminescence in liquid phosphors under X-ray excitation has been proposed. The corresponding spatial distributions for electronic excitations and local heating are obtained. They are described by Gaussian functions, the parameters of which are related to the kinetic energy of an X-ray quantum and the medium characteristics. The explanation to a low quantum yield of luminescence in liquid phosphors under the X-ray excitation in comparison with a high quantum yield at the photoluminescence is given. It is shown that the major losses in this case occur at the stage of electronic excitation migration from the solvent to phosphor molecules.

Key words: luminescence, photoluminescence, spatial distribution of electronic excitations, liquid phosphors.

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