Abstract
A previously reported quadrupolar spin–echo experiment using adiabatic pulses, which can achieve uniform excitation of quadrupolar nuclei across a wide bandwidth, has been extended to a QCPMG-like sequence exhibiting the same uniform, broadband excitation as the echo experiment but with the advantage of a significant increase in S/N. This WURST–QCPMG sequence is used to obtain static wideline 71Ga (spin-3/2) and 91Zr (spin-5/2) spectra with linewidths in excess of 500 kHz, on a standard probe at 9.4 T without any transmitter frequency or field adjustment. The sequence is also used to observe the 59Co (spin-7/2) central transition and inner satellite transitions.
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