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Determination of the quadrupole coupling from featureless line shapes
Author(s) -
Hepp M. A.,
Man P. P.,
Trokiner A.,
Fraissard J.
Publication year - 1994
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.1260320106
Subject(s) - quadrupole , chemistry , nutation , nuclear magnetic resonance , spectral line , pulse sequence , relaxation (psychology) , coupling (piping) , line (geometry) , atomic physics , molecular physics , analytical chemistry (journal) , physics , geometry , quantum mechanics , mechanical engineering , psychology , social psychology , mathematics , chromatography , engineering
NMR nutation and quadrupole echo experiments were used to determine the quadrupole frequency (ω Q ) of 87 Rb ( I = 3/2) in a single crystal of RbCaF 3 . Since RbCaF 3 has a cubic unit cell above 195 K, there is no second‐order quadrupole shift and the spectrum is rather featureless. By fitting the response of 87 Rb, as a function of pulse duration, to the predicted response we were able to determine that the average ω Q /2π = 4.5 kHz in this sample. Discrepancies in the agreement between the theory and the experiment for the echo response were attributed to differential relaxation of the central and satellite transitions.