Ej. Fordham et al., EFFECTIVE DIFFUSION TIMES IN MULTIPLE-PULSE PFG DIFFUSION MEASUREMENTS IN POROUS-MEDIA, Journal of magnetic resonance. Series A, 121(2), 1996, pp. 187-192
Expressions for the effective diffusion times in multiple-gradient pul
se diffusion measurements in liquid-saturated porous media are derived
. This is necessary since the diffusion coefficient is time dependent.
The results are needed for quantitative interpretation of the results
of PFG diffusion measurements using the multiple-alternating-gradient
schemes which are preferred for the majority of porous systems. The e
ssence of the calculation and the results for ''square'' and ''sine''
pulse shapes have appeared previously, but without derivation. The det
ails of this somewhat technical calculation may be needed by users. (C
) 1996 Academic Press, Inc.