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A pulse sequence for T1 measurement by inversion–recovery in the presence of acoustic ringing

A pulse sequence is presented which allows one to perform an inversion–recovery experiment for T1 determination on quadrupolar nuclei in the presence of acoustic ringing. The sequence is based on a modification of the reference baseline subtraction −90° pulse sequence. Some examples of 17O and 14N and relaxation are presented, including spectra with overlapping peaks from which T1 values cannot be simply extracted from line widths.