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Side‐band analysis in variable‐angle sample‐spinning (VASS) NMR for the central transition of quadrupolar nuclei (half‐integer spin)
Author(s) -
Amoureux J. P.,
Fernandez C.,
Lefebvre F.
Publication year - 1990
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260280103
Subject(s) - spinning , chemistry , spin (aerodynamics) , integer (computer science) , sideband , rotation (mathematics) , half integer , crystallography , condensed matter physics , physics , geometry , quantum mechanics , mathematics , thermodynamics , microwave , polymer chemistry , programming language , computer science
Variable‐angle sample‐spinning (VASS) NMR was investigated for the case of limited rotation speed of the spinner. Side‐band intensities and line‐shapes for the central transition of half‐integer quadrupolar spin nuclei were calculated as a function of the parameter \documentclass{article}\pagestyle{empty}\begin{document}$ X = \frac{1}{4}[I(I + 1) - \frac{3}{4}]v_{\rm Q} ^2 (1 + \eta ^2 /3)/v_{\rm L} v_{\rm R}$\end{document} . It is shown that complex sideband patterns can be analysed using a very fast computational program.