Spin-Lattice and Spin-Spin Relaxation in Porous Media: A Generalized Two Site Relaxation Model

✍ Scribed by M.Y. Su; O. Nalcioglu

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 348 KB
• Volume: 160
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1993.1404

✦ Synopsis

The (T_{1}) and (T_{2}) relaxation times in porous media have been greatly used in the field of petrophysics and biology. The relaxation behavior can be used as a fingerprint of a system, or can provide information on some other parameters which cannot be easily measured. In this paper, we investigate the behavior of the (T_{1}) and (T_{2}) relaxation in two types of media, (1) an object consisting of closely packed glass beads and (2) a column of gel beads. We assume a generalized two site relaxation process for both of the objects. This model assumes that the spins in the medium are under two different relaxation modes and the two modes are in fast exchange with each other. The results confirm that the generalized two site refaxation model is applicabie for both types of porous media. A possible explanation for the relaxation mechanism is also discussed. (a) 1993 Academic Press, Inc.