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207Pb liquid-state NMR spectra calibrations of 90 degree pulse power level (bottom, expressed in power level attenuation or dB) and pulse length (top, expressed in microseconds) at a particular carrier frequency of O1 =−3000 ppm (− 376686 Hz) and spectral width SW = 2995.5 ppm (0.375 MHz) of the standard lead citrate sample (C12H10O14Pb3).
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