Raymond I Kendrick

US Patent:

43520669, Sep 28, 1982

Filed:

Oct 31, 1980

Appl. No.:

6/202546

Inventors:

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.

US Patent:

42912725, Sep 22, 1981

Filed:

Dec 28, 1979

Appl. No.:

6/108254

Inventors:

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.