System for detecting nuclear magnetic resonance signals from sma

Details System for detecting nuclear magnetic resonance signals from sma System for detecting nuclear magnetic resonance signals from sma

1991-02-11

1992-11-24

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

051666154

ABSTRACT:
Apparatus and methods for detecting NMR signals from small samples using mechanical oscillators. In one embodiment, the sample is affixed to the mechanical oscillator, and immersed in a magnetic field. Magnetic resonance is detected by monitoring the mechanical excitation of the oscillator. The greatest excitation occurs when there is a three-fold resonance between the spin precession frequency of the sample, the natural frequency of the oscillator, and the oscillation frequency of the applied time dependent magnetic field. Samples as small as a single atomic nucleus can generate a detectable signal. In a second embodiment, the sample is affixed to a mechanically vibrating substrate, and a magnetic source is affixed to the mechanical oscillator.

REFERENCES:
patent: 4889526 (1989-12-01), Rauscher et al.

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