Using hyperbolic secant pulses to assist characterization of chemical shift tensors for half-integer spin quadrupolar nuclei in MAS powder samples

2009 ◽  
Vol 47 (6) ◽  
pp. 465-471 ◽  
Author(s):  
Thomas T. Nakashima ◽  
Roshanak Teymoori ◽  
Roderick E. Wasylishen
1992 ◽  
Vol 47 (5) ◽  
pp. 665-674
Author(s):  
J. P. Amoureux

Abstract This article describes a few aspects of NMR characterization of half-integer quadrupolar nuclei in powder samples which are either static or rotating around one fixed axis (M.A.S. and V.A.S. techniques). The simultaneous occurence of C.S.A. and quadrupole interactions with possible noncoincident tensors is discussed. Two experimental limitations are taken into accout: the sample spinning speed and the RF-amplifier power


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