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Effect of RF field inhomogeneity on the longitudinal magnetization transfer at a mixing time of 8 ms fp-RFDR for different phase cycles as indicated for a three spin 1/2 system at a MAS speed of: (A) 10 kHz, (B) 20 kHz, (C) 40 kHz, (D) 60 kHz and (E) 100 kHz. The value on the x-axis indicates the ratio of the applied RF field strength to the accurate RF field strength (i.e., 250 kHz). The homonuclear dipolar coupling was set as 29.3 kHz.
