✦ LIBER ✦

Multiple Nonlinear Stimulated Echoes

✍ Scribed by I. Ardelean; R. Kimmich; S. Stapf; D.E. Demco

Book ID: 102600390
Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 176 KB
Volume: 127
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.1997.1197

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✦ Synopsis

Three-pulse sequences in the presence of magnetic field gradients at high magnetic fields produce multiple nonlinear stimulated echoes (NOSE) at times ntau1 after the third pulse, where n is an integer and tau1 the interval between the first two pulses. These phenomena are due to the demagnetizing field produced by the spatial modulation of the nuclear magnetization arising in the sample after the first two pulses. The theory is presented and compared with experiments. The dependence of the NOSE amplitudes on the flip angles and on the pulse intervals is described. Implications for multidimensional NMR experiments based on sequences of three or more pulses in the presence of field gradients are discussed.

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