NQR Method for Stress and Pressure Imaging

Pure nuclear quadrupole resonance parameters such as the linewidth, the line moments, and the resonance frequency are influenced by mechanical stress or pressure. A surface-coil method is described which permits the spatially resolved measurement of those quantities near surfaces of solid objects. T...

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Bibliographic Details
Published in:Journal of magnetic resonance. Series A 1994-12, Vol.111 (2), p.191-194
Main Authors: Nickel, P., Robert, H., Kimmich, R., Pusiol, D.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Magnetic components, instruments and techniques
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Nuclear magnetic resonance and relaxation
Physics
Quadrupole resonance
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Summary:Pure nuclear quadrupole resonance parameters such as the linewidth, the line moments, and the resonance frequency are influenced by mechanical stress or pressure. A surface-coil method is described which permits the spatially resolved measurement of those quantities near surfaces of solid objects. The rotating-frame nuclear quadrupole resonance imaging (ρNQRI) technique makes depth resolution feasible with the aid of gradients of the radiofrequency amplitude. Test experiments for the determination of the spatial distribution of bending stress and pressure are reported. Diverse probe substances are suggested. It is demonstrated that the technique is suitable for contactless pressure or stress measurements.
ISSN:1064-1858
1096-0864
DOI:10.1006/jmra.1994.1246