Publication Type
Journal
Journal Name
Physical Review E
Publication Date
Page Number
064608
Volume
109
Issue
6
Abstract
We report on the self-part of the Van Hove correlation function, the correlation function describing the dynamics of a single molecule, of water and deuterated water. The correlation function is determined by transforming inelastic scattering spectra of neutrons or x rays over a wide range of momentum transfer 𝑄 and energy transfer 𝐸 to space 𝑅 and time 𝑡. The short-range diffusivity is estimated from the Van Hove correlation function in the framework of the Gaussian approximation. The diffusivity has been found to be different from the long-range macroscopic diffusivity, providing information about local atomic dynamics.
