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On the use of NMR pulsed field-gradient spectroscopy for the study of anomalous diffusion in fractal networks

✍ Scribed by Jörg Kärger; Günter Vojta

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
237 KB
Volume
141
Category
Article
ISSN
0009-2614

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✦ Synopsis

Theoretical questions of NMR spin echo attenuation due to diffusion in fractal systems are examined. The mean-square displacement of anomalous diffusion depends sublinearly on time. Therefore, this stochastic process is not invariant against time translation. The correct adjustment of the time scale is a crucial prerequisite for the proper reflection of molecular migration by means of spin-echo experiments.

📜 SIMILAR VOLUMES

Theory of NMR field-gradient spectroscop
Theory of NMR field-gradient spectroscopy for anomalous diffusion in fractal networks
✍ Giancarlo Jug 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 346 KB

Theoretical predictions for the spin-echo amplitude attenuation in a field-gradient NMR experiment in a porous medium are presented for both continuous and pulsed spectroscopy. The diffusion is modelled by a random walk process on a fractal network and should correspond to observations in well-chara