Raymond D. Kendrick - San Jose CA Robert A. Wind - Zoetermeer, NL Costantino S. Yannoni - Los Gatos CA
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G01N 2700
US Classification:
324321
Abstract:
A method for adjusting the orientation of the rotation axis for a sample in a nuclear magnetic resonance (NMR) experiment includes using a field gradient in a specific direction with respect to the external magnetic field of the NMR experiment to establish a calibrated reference direction with which the rotation axis may be aligned. Preferably, the magnetic field gradient is at an angle of 54. 7. degree. A preferred embodiment of this invention includes automatic control steps in the method.
Method For Reducing Homonuclear Broadening In Magnetic Resonance Spectra Of Solids
Donald C. Hofer - Hopewell Junction NY Raymond D. Kendrick - San Jose CA Costantino S. Yannoni - Los Gatos CA
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G01N 2700
US Classification:
324313
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.