An NMR Experiment

What Happens Next?

The B1 field is turned off and Mxy continues to precess about Bo at frequency wo. 

z

x

Mxy

Receiver coil (x)

y

Þ  NMR signal

wo

The oscillation of Mxy generates a fluctuating magnetic field which can be used to generate a current in a receiver coil to detect the NMR signal.

FID – Free Induction Decay