Kinetic Model for Spatial Distribution of Electron Excitations in Liquid Phosphors

  • V. Ya. Degoda Taras Shevchenko National University of Kyiv, Faculty of Physics
  • I. M. Moroz Taras Shevchenko National University of Kyiv, Faculty of Physics
Keywords: luminescence, photoluminescence, spatial distribution of electronic excitations, liquid phosphors


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.


N.Z. Galunov and V.P. Seminozhenko, Theory and Application of Radioluminescence of Organic Condensed Matter (Naukova dumka, Kiev, 1997) (in Russian).

N.Z. Galunov and O.A. Tarasenko, Track Formation of Ionizing Radiation in Organic Condensed Media (Inst. of Scint. Mat., Inst. of Monocrystals of the NASU, Kharkiv, 2011) (in Russian).

D.L. Horrocks, Applications of Liquid Scintillation Counting (Academic Press, New York, 1974).

A.A. Ishchenko, Structure and Spectral Luminescent Properties of Polymethine Dyes (Naukova dumka, Kiev, 1994) (in Russian).

W. Schmidt, Optical Spectroscopy in Chemistry and Life Sciences: An Introduction (Wiley-VCH, Weinheim, 2005).

S.P. Hau-Riege, High-Intensity X-Rays – Interaction with Matter (Wiley-VCH, Weinheim, 2011).

E.V. Shpolsky, Introduction to Atomic Physics (Gostekhizdat, Moscow, 1949) (in Russian).

N.A. Dyson, X-Rays in Atomic and Nuclear Physics (Cambrige Univ. Press, Cambridge, 1990).

E.D. Aluker, D.Yu. Lusis, and S.A. Chernov, Electron Excitations and Radioluminescence of Alkali-Halide Crystals (Zinatne, Riga, 1979) (in Russian).

V.M. Byakov and F.G. Nichiporov, Intratrack Chemical Processes (Energoatomizdat, Moscow, 1985) (in Russian).

N.F. Mott and H.S.W. Massey, The Theory of Atomic Collisions (Oxford Univ. Press, Oxford, 1965).

D.V. Sivukhin, General Course of Physics. Nuclear Physics (Fizmatlit, Moscow, 1986) (in Russian).

T.I. Savelova, Monte-Carlo Method (MEPhI, Moscow, 2011) (in Russian).

V.Ya. Degoda and A.O. Sofienko, Ukr. J. Phys. 52, 255 (2007).

V.M. Agranovich and M.D. Galanin, Electron Excitation Energy Transfer in Condensed Matter (North-Holland, Amsterdam, 1983).

Th. Forster, Ann. Phys. 437, 55 (1948) [doi:10.1002/ andp.19484370105].

D.C Harris, in Applications of Spectrophotometry, Quantitative Chemical Analysis (Freeman, New York, 2010), p. 419.

A.L. David, Chem. Phys. 135, 195 (1989).

J. Blumm, A. Lindemann, B. Niedrig, and R. Campbell, Int. J. Thermophys. 28, 674 (2007).

D.R. Lide, CRC Handbook of Chemistry and Physics (Chemical Rubber Publ., Boston, 1999).

How to Cite
Degoda, V., & Moroz, I. (2019). Kinetic Model for Spatial Distribution of Electron Excitations in Liquid Phosphors. Ukrainian Journal of Physics, 61(1), 3.
Atoms and molecules