Nuclear Physics and Atomic Energy


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
  Periodicity: 4 times per year

  Open access peer reviewed journal


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Nucl. Phys. At. Energy 2021, volume 22, issue 3, pages 259-262.
Section: Atomic Energy.
Received: 19.05.2021; Accepted: 22.12.2021; Published online: 22.02.2022.
PDF Full text (en)
https://doi.org/10.15407/jnpae2021.03.259

ffect of fullerene C60 on the diffusion of organic solvents' molecules

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

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

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

Abstract: The results of studying the dynamics of molecules of solutions of fullerene C60 in benzene and toluene are presented. The studies were carried out by the method of quasi-elastic scattering of slow neutrons. The following were determined: the total self-diffusion coefficient D, its collective Dcoll and single-particle Ds-p contributions, and molecule relaxation time τ0 before and after the dissolution of fullerene. It is necessary to pay attention to the fact that in our case a kind of neutron contrast experiment takes place. The significant difference (more than ten times) in the cross-sections for an incoherent scattering of neutrons by hydrogen and carbon nuclei made it possible to obtain diffusion parameters that characterize the dynamics of solvent molecules exclusively. It turned out that the intensity of diffusion movements of solvent molecules is almost ten times higher than the mobility of fullerene molecules.

Keywords: fullerenes, quasi-elastic scattering of slow neutrons, self-diffusion coefficient, single-particle and collective components of the self-diffusion coefficient.

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