Nuclear Physics and Atomic Energy

ядерна ф≥зика та енергетика
Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English, Russian
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Nucl. Phys. At. Energy 2018, volume 19, issue 1, pages 69-73.
Section: Engineering and Methods of Experiment.
Received: 15.02.2018; Accepted: 22.03.2018; Published online: 12.05.2018.
PDF Full text (ua)
https://doi.org/10.15407/jnpae2018.01.069

Temperature features of molecules' dynamics in "heavy water - glycerol" solution

O. A. Vasylkevych*, V. I. Slisenko

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

*Corresponding author. E-mail address: a.vas@i.ua

Abstract: By the method of quasi-elastic scattering of slow neutrons, the dynamics of molecules of the solution "heavy water - glycerol" with glycerol concentration of 0.046 molar fractions has been studied in the temperature range (2 - 10) °—. The features in the temperature dependence of total self-diffusion coefficient and its one-particle component are found: at 3 °C deep minimum is observed. In this case, the residence time of the molecule of glycerol in the vibrational state increases substantially. The analysis shows that these effects are due to increase in the intensity of the clustering processes at 3 °C.

Keywords: quasielastic scattering of slow neutrons, self-diffusion coefficient, single-particle and collective components of the coefficient of self-diffusion, molecule jump length.

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