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Analysis and Implications of Transition-Band Signals in High-Resolution NMR

✍ Scribed by Csaba Szántay Jr.

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
384 KB
Volume
135
Category
Article
ISSN
1090-7807

No coin nor oath required. For personal study only.

✦ Synopsis

The problem of signals generated in and received from regions outside the active coil area is discussed in the context of using standard measurement techniques. Some of the conceptual and practical consequences of the existence of such transition-band signals are highlighted. Examples include radiation damping, pulse-width calibration, lineshape and radiofrequency homogeneity tests, improper saturation, and exchange- and relaxation-rate determinations. One interesting implication is that apparent sample-to-sample variations in the calibrated 90 degrees pulse width values are a function not only of probe tuning and bulk susceptibility effects, but also of the linewidths involved. A semi-quantitative treatment of the phenomenon is also given.

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