A new concept for selective excitation in NMR

The new NMR concept of selective excitation generated by pulses whose envelope is slaved to that of a signal originating from the sample is described. It is shown that these kinds of pulses exhibit interesting features such as a sort of auto-calibration of the pulse length and phase. These particular features are discussed and experimental evidence is given. Illustration of the use of slaved pulses is demonstrated in the case of 1D transient NOE by selective inversion.