Method for reducing homonuclear broadening in magnetic resonance

Details Method for reducing homonuclear broadening in magnetic resonance Method for reducing homonuclear broadening in magnetic resonance

1979-12-28

1981-09-22

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324304, G01N 2700

Patent

active

042912725

ABSTRACT:
A method for line narrowing in nuclear magnetic resonance (NMR) studies in solids is described. The method employs quasi-continuous amplitude modulation of an rf field wherein the field is eliminated at intervals for short periods of time at or about the time when the amplitude for both the maximum and minimum approach zero, these intervals creating windows where the NMR signal can be observed.

REFERENCES:
patent: 3474329 (1969-10-01), Waugh
patent: 3530374 (1970-09-01), Haeberlen et al.
patent: 3795856 (1974-03-01), Keller
patent: 3968423 (1976-07-01), Hoshino
M. L. Lee et al., "Nuclear-Magnetic-Resonance Line Narrowing by a Rotating rf Field", Phys. Rev., vol. 140, No. A4, (1965), pp. 1261-1271.
C. Yannoni et al., "A New Coherent Averaging Effect in Magnetic Resonance Modulation-Induced Reduction of Dipolar Coupling", Phys. Rev. Letters, vol. 37, (1976), pp. 1230-1232.
Ellett et al., "Advances in Magnetic Resonance", vol. 5, J. S. Waugh, Academic Press, N.Y. (1971), p. 117-176 (Particular reference to "phase glitches" are on page 170 and are set forth in Section D3, pp. 142-147).
J. S. Waugh et al., Phys. Rev. Letters, vol. 20, No. 5, pp. 180-182 (1968).

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