In this Letter, we describe a simplification of traditional NMR diffusion e
xperiments suitable for the case of time dependent diffusion coefficients.
It is shown that by setting the experimental attenuation parameter b = gamm
a (2)g(2)delta (2)t(d), where td is the diffusion time, to a fixed value, i
t is possible to observe the characteristic variation of the normalized ech
o amplitude in restricted diffusion conditions and to construct the experim
ental curve D(t(d))/D-0 without actually performing all the measurements of
the diffusion coefficient at the various times. This yields dramatic exper
imental time reduction. (C) 2001 Elsevier Science B.V. All rights reserved.