|
Journal of Physical Studies 6(2), 172–179 (2002)
DOI: https://doi.org/10.30970/jps.06.172 DIFFERENT TYPES OF DIFFUSION IN LIQUIDS BY QUASI-ELASTIC NEUTRON SCATTERINGA. Ya. Dzyublik, V. I. Slisenko, A. A. Vasilkevich
Institute for Nuclear Research of the Ukrainian Academy of Sciences |
 |
A general expression for the incoherent quasi-elastic neutron scattering (QENS) cross section by a liquid is derived, taking into account the continuous translational and rotational diffusion of the so-called Lagrange particles (associations of atoms or molecules) as well as jumps of hydrogen atoms inside these particles. Both types of continuous motion are considered, starting from the Langevin equations. Besides, we carried out a QENS experiment on spirits, whose results agree well with our theory.
PACS number(s): 61.25.-f