Single-Quantum NMR Spinning-Side-Band Patterns for Spin-3/2 System
A. Lupulescua,b, R. Fechetec, D.E. Demcob,a and O. Cozarc
aTechnical University, Department of Physics, 3400 Cluj-Napoca, Romania
bMax-Planck Institut für Polymerforschung, Postfach 3148, 55021 Mainz, Germany
cFaculty of Physics, University Babes-Bolyai, 3400 Cluj-Napoca, Romania
Received: June 24, 1997
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The NMR response of an isolated spin-3/2 system with an axially symmetric quadrupolar interaction under magic-angle sample spinning to an ideal radio-frequency pulse using irreducible tensor operators is evaluated analytically. The excited single-quantum spin coherences are modulated by the sample spinning. The effects of spinning frequency, quadrupole coupling constant and the orientation of quadrupolar interaction relative to rotor axis on the spinning-side-band patterns are simulated. High-resolution single-quantum spinning-side-band pattern detected for 23Na (I=3/2) nuclei in sodium nitrate powder is compared with the simulation based on the theory and the quadrupole coupling is estimated.
DOI: 10.12693/APhysPolA.92.1125
PACS numbers: 33.25.+k, 33.40.+f