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Comparison between the classical exp[−bD] predictions expected from a pulsed-gradient spin-echo experiment for a variety of D diffusion coefficients (solid lines) and numerical predictions arising for the corresponding cases from the model introduced in the Appendix (points). Calculation parameters assumed δ=5 ms, Δ=30 ms, γ=4.257 kHz∕G, and a maximum gradient |G|=20 G∕cm.
