Mode-coupling effects on self-diffusion in a simple fluid at freezing

The suppression of the self-diffusion constant ${\mathit{D}}_{\mathit{L}}$ for a simple fluid in the long-time limit in comparison to the corresponding short-time or bare value is computed taking into account the mode-coupling effects to lowest order. We obtain a value of ${\mathit{D}}_{\mathit{L}}$/${\mathit{D}}_0$=0.11 at the freezing density in close agreement with the observed value of 0.10 for different systems. © 1996 The American Physical Society.