International Business Machines Corporation

Robert A Wind

Costantino S Yannoni

Raymond D Kendrick

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 adjusting the magic angle in NMR experiments

A method for spin imaging in solids using nuclear magnetic resonance (NMR) spectroscopy. The invention includes the steps of rotating the sample about an axis which makes a particular angle with the NMR static external magnetic field, rotating a magnetic field gradient with a spatial distribution which is related to the sample spinning axis synchronously with the sample, collecting the data while performing a solid state NMR line narrowing step, and changing the phase relation between the sample rotation and the field gradient rotation on a step-by-step basis to map out an image of the object.

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Zoetermeer, Netherlands

Robert A Wind