*
=
tp
NMR Pulse
FT
A radiofrequency pulse is
a combination of a wave (cosine) of frequency wo and a step function
Pulse length (time, tp)
The fourier transform indicates the pulse covers a range of
frequencies
Hisenberg Uncertainty principal
again: Du.Dt ~ 1/2p
Shorter pulse length – larger
frequency envelope
Longer pulse length –
selective/smaller frequency envelope
Sweep Width
f ~ 1/t