Decay of multiple quantum NMR coherences in quasi-one-dimensional chains in calcium fluorapatite

Multiple quantum (MQ) nuclear magnetic resonance (NMR) experiment is considered on chains of fluorine atoms in calcium fluorapatite. The second moments of the line shapes of the MQ coherences on the evolution period of the MQ NMR experiment are calculated analytically in the approximation of nearest...

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Bibliographic Details
Published in:Magnetic resonance in solids 2019, Vol.21 (1)
Main Authors: Bochkin, G.A., Fel’dman, E.B., Lazarev, I.D., Vasil’ev, S.G., Volkov, V.I.
Format: Article
Language:English
Subjects:
Calcium
Chains
Coherence
Evolution
Fluorapatite
Fluorine
Mathematical analysis
NMR
Nuclear magnetic resonance
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Summary:Multiple quantum (MQ) nuclear magnetic resonance (NMR) experiment is considered on chains of fluorine atoms in calcium fluorapatite. The second moments of the line shapes of the MQ coherences on the evolution period of the MQ NMR experiment are calculated analytically in the approximation of nearest neighbor interactions. The calculated values are used for a description of the experimental data with semi-phenomenological formulas assuming that the relaxation of the MQ coherences follows the Gaussian law on the evolution period. A satisfactory agreement with the experimental data is demonstrated.
ISSN:2072-5981
2072-5981
DOI:10.26907/mrsej-19106