Field-Cycling NMR Relaxometry

The main objective of field-cycling experiments [231, 367] is to obtain information on the spectral density of the fluctuating spin interactions in a frequency range as wide as possible.1 Typical examples are discussed in Chaps. 14 and 16 (see Figs. 12.1 and 14.2, for instance). The origin of the fluctuations is normally molecular dynamics so that these can be characterized in a direct and quantitative way.

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