Response to “Comment on ‘Self-diffusion near the liquid–vapor critical point’ ” [J. Chem. Phys. 116, 6379 (2002)]

It was predicted by us [J. Chem. Phys. 114, 4912 (2001)] that the presence of local density enhancements in a neat supercritical fluid near its liquid–vapor critical point should generate a weak anomaly in the fluid's self-diffusion constant. Herein, we examine possible reasons why the limited number of experimental studies conducted to date on diffusion constants in near-critical supercritical fluids do not provide clear evidence of this predicted weak anomaly.