Open AccessHIGH-RESOLUTION NMR SPECTROSCOPIC STUDY ON THE CENTRAL TRANSITION OF SPIN-3/2 QUADRUPOLAR NUCLEI IN POWDERS
Author(s) -
Gengying Li,
Wu Xue-Wen
Publication year - 1990
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.39.1848
Subject(s) - materials science , excitation , magnetization , resolution (logic) , spin (aerodynamics) , nuclear magnetic resonance , tensor (intrinsic definition) , electric field gradient , orientation (vector space) , pulse (music) , spectral line , field (mathematics) , molecular physics , magnetic field , condensed matter physics , atomic physics , physics , optics , mathematics , quantum mechanics , quadrupole , artificial intelligence , astronomy , detector , computer science , pure mathematics , thermodynamics , geometry
We make use of the selectivity of pulse excitation in the central transition of spin-3/2 quadrupolar nuclei, and in powder sample, employ a 90°pulse to rotate the nuclear spin magnetization of certain spatial orientation of the electric-field-gradient tensor to the XY plane of the rotating frame for detection. Thus, high resolution spectrum similar to that obtained in a single crystal is acquired. The result is analyzed by density operator formula theoretically and confirmed by 23Na spectra of NaNO2 and Na2SO4 powders experimentally.